From a0efca01c7078fae3dd08f0af8cd36afb06b6d80 Mon Sep 17 00:00:00 2001
From: 0xFEEDC0DE64 <daniel@brunner.ninja>
Date: Sun, 18 Dec 2022 03:30:46 +0100
Subject: [PATCH] Refactorings and preperations for loop station

---
 DrumMachine.pro       |   6 ++
 djwidget.cpp          |  16 +++
 djwidget.h            |  12 ++-
 drumpadwidget.cpp     | 152 ++++++++++++++++++++++++++++
 drumpadwidget.h       |  60 +++++++++++
 drumpadwidget.ui      | 108 ++++++++++++++++++++
 main.cpp              |  48 +--------
 mainwindow.cpp        | 204 ++++++++++++++++++++------------------
 mainwindow.h          |  27 ++---
 mainwindow.ui         | 226 ++++++++++++------------------------------
 midiinwrapper.h       |   6 +-
 presetsmodel.cpp      |  41 ++++++++
 presetsmodel.h        |   7 ++
 sampleswidget.cpp     |  16 ++-
 sampleswidget.h       |   8 +-
 samplewidget.cpp      |  13 +++
 samplewidget.h        |   6 +-
 samplewidget.ui       |  21 ++--
 sequencerwidget.h     |   2 +-
 synthisizer.cpp       |   4 -
 synthisizer.h         |   5 +-
 synthisizerwidget.cpp |  33 ++++++
 synthisizerwidget.h   |  35 +++++++
 synthisizerwidget.ui  |  32 ++++++
 24 files changed, 735 insertions(+), 353 deletions(-)
 create mode 100644 drumpadwidget.cpp
 create mode 100644 drumpadwidget.h
 create mode 100644 drumpadwidget.ui
 create mode 100644 synthisizerwidget.cpp
 create mode 100644 synthisizerwidget.h
 create mode 100644 synthisizerwidget.ui

diff --git a/DrumMachine.pro b/DrumMachine.pro
index 4224bd3..e707c5f 100755
--- a/DrumMachine.pro
+++ b/DrumMachine.pro
@@ -16,6 +16,7 @@ SOURCES += \
     audioplayer.cpp \
     djwidget.cpp \
     drummachinesettings.cpp \
+    drumpadwidget.cpp \
     filesmodel.cpp \
     graphrenderer.cpp \
     jsonconverters.cpp \
@@ -33,6 +34,7 @@ SOURCES += \
     scratchwidget.cpp \
     sequencerwidget.cpp \
     synthisizer.cpp \
+    synthisizerwidget.cpp \
     trackdeck.cpp \
     treetotableproxymodel.cpp
 
@@ -42,6 +44,7 @@ HEADERS += \
     audioplayer.h \
     djwidget.h \
     drummachinesettings.h \
+    drumpadwidget.h \
     filesmodel.h \
     graphrenderer.h \
     jsonconverters.h \
@@ -58,16 +61,19 @@ HEADERS += \
     scratchwidget.h \
     sequencerwidget.h \
     synthisizer.h \
+    synthisizerwidget.h \
     trackdeck.h \
     treetotableproxymodel.h
 
 FORMS += \
     djwidget.ui \
+    drumpadwidget.ui \
     mainwindow.ui \
     presetdetailwidget.ui \
     sampleswidget.ui \
     samplewidget.ui \
     sequencerwidget.ui \
+    synthisizerwidget.ui \
     trackdeck.ui
 
 RESOURCES += \
diff --git a/djwidget.cpp b/djwidget.cpp
index cb4e626..f75e52f 100644
--- a/djwidget.cpp
+++ b/djwidget.cpp
@@ -75,6 +75,22 @@ void DjWidget::writeSamples(frame_t *begin, frame_t *end)
     }
 }
 
+void DjWidget::loadSettings(DrumMachineSettings &settings)
+{
+}
+
+void DjWidget::unsendColors()
+{
+}
+
+void DjWidget::sendColors()
+{
+}
+
+void DjWidget::messageReceived(const midi::MidiMessage &message)
+{
+}
+
 void DjWidget::directorySelected()
 {
     const auto selected = m_ui->treeViewDirectories->currentIndex();
diff --git a/djwidget.h b/djwidget.h
index 41b9d27..3497458 100644
--- a/djwidget.h
+++ b/djwidget.h
@@ -7,9 +7,11 @@
 #include <memory>
 
 #include "audioformat.h"
+#include "midicontainers.h"
 #include "treetotableproxymodel.h"
 
 namespace Ui { class DjWidget; }
+class DrumMachineSettings;
 
 class DjWidget : public QWidget
 {
@@ -20,8 +22,16 @@ public:
     ~DjWidget() override;
 
     void injectDecodingThread(QThread &thread);
-
     void writeSamples(frame_t *begin, frame_t *end);
+    void loadSettings(DrumMachineSettings &settings);
+    void unsendColors();
+    void sendColors();
+
+signals:
+    void sendMidi(const midi::MidiMessage &midiMsg);
+
+public slots:
+    void messageReceived(const midi::MidiMessage &message);
 
 private slots:
     void directorySelected();
diff --git a/drumpadwidget.cpp b/drumpadwidget.cpp
new file mode 100644
index 0000000..1a287c8
--- /dev/null
+++ b/drumpadwidget.cpp
@@ -0,0 +1,152 @@
+#include "drumpadwidget.h"
+#include "ui_drumpadwidget.h"
+
+#include <QNetworkRequest>
+#include <QNetworkReply>
+#include <QNetworkAccessManager>
+#include <QMessageBox>
+
+#include "jsonconverters.h"
+
+DrumPadWidget::DrumPadWidget(QWidget *parent) :
+    QSplitter{parent},
+    m_ui{std::make_unique<Ui::DrumPadWidget>()}
+{
+    m_ui->setupUi(this);
+
+    connect(m_ui->samplesWidget, &SamplesWidget::sendMidi, this, &DrumPadWidget::sendMidi);
+
+    connect(m_ui->sequencerWidget, &SequencerWidget::triggerSample, m_ui->samplesWidget, &SamplesWidget::sequencerTriggerSample);
+
+    m_presetsProxyModel.setFilterCaseSensitivity(Qt::CaseInsensitive);
+    m_presetsProxyModel.setSortRole(Qt::EditRole);
+    m_presetsProxyModel.setSourceModel(&m_presetsModel);
+    m_ui->presetsView->setModel(&m_presetsProxyModel);
+
+    m_presetsProxyModel.setFilterKeyColumn(1);
+
+    connect(m_ui->lineEdit, &QLineEdit::textChanged, &m_presetsProxyModel, &QSortFilterProxyModel::setFilterFixedString);
+
+    m_ui->filesView->setModel(&m_filesModel);
+
+    connect(m_ui->presetsView->selectionModel(), &QItemSelectionModel::currentRowChanged, this, &DrumPadWidget::currentRowChanged);
+
+    connect(m_ui->pushButtonRefresh, &QAbstractButton::pressed, this, &DrumPadWidget::loadPresets);
+}
+
+DrumPadWidget::~DrumPadWidget() = default;
+
+void DrumPadWidget::selectFirstPreset()
+{
+    if (!m_presetsProxyModel.rowCount())
+        return;
+
+    const auto index = m_presetsProxyModel.index(0, 0);
+    if (index.isValid())
+    {
+        m_ui->presetsView->selectionModel()->select(index, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
+        currentRowChanged(index);
+    }
+}
+
+void DrumPadWidget::writeSamples(frame_t *begin, frame_t *end)
+{
+    m_ui->samplesWidget->writeSamples(begin, end);
+}
+
+void DrumPadWidget::injectNetworkAccessManager(QNetworkAccessManager &networkAccessManager)
+{
+    m_networkAccessManager = &networkAccessManager;
+    loadPresets();
+    m_ui->samplesWidget->injectNetworkAccessManager(networkAccessManager);
+}
+
+void DrumPadWidget::injectDecodingThread(QThread &thread)
+{
+    m_ui->samplesWidget->injectDecodingThread(thread);
+}
+
+void DrumPadWidget::loadSettings(DrumMachineSettings &settings)
+{
+    m_ui->samplesWidget->loadSettings(settings);
+}
+
+void DrumPadWidget::unsendColors()
+{
+    m_ui->samplesWidget->unsendColors();
+}
+
+void DrumPadWidget::sendColors()
+{
+    m_ui->samplesWidget->sendColors();
+}
+
+void DrumPadWidget::messageReceived(const midi::MidiMessage &message)
+{
+    m_ui->samplesWidget->messageReceived(message);
+}
+
+void DrumPadWidget::currentRowChanged(const QModelIndex &current)
+{
+    if (!current.isValid())
+        return;
+
+    const auto &preset = m_presetsModel.getPreset(m_presetsProxyModel.mapToSource(current));
+
+    m_ui->presetDetailWidget->setPreset(preset);
+    m_filesModel.setPreset(preset);
+    m_ui->sequencerWidget->setPreset(preset);
+    m_ui->samplesWidget->setPreset(preset);
+}
+
+void DrumPadWidget::loadPresets()
+{
+    if (!m_networkAccessManager)
+    {
+        qWarning() << "no network access manager available";
+        return;
+    }
+
+    m_ui->pushButtonRefresh->setEnabled(false);
+
+    QNetworkRequest request{QUrl{"https://brunner.ninja/komposthaufen/dpm/presets_config_v12.json"}};
+    request.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache);
+    request.setAttribute(QNetworkRequest::CacheSaveControlAttribute, true);
+
+    m_reply = std::unique_ptr<QNetworkReply>(m_networkAccessManager->get(request));
+    connect(m_reply.get(), &QNetworkReply::finished, this, &DrumPadWidget::requestFinished);
+}
+
+void DrumPadWidget::requestFinished()
+{
+    qDebug() << "called";
+
+    if (!m_reply)
+    {
+        qWarning() << "no valid reply";
+        return;
+    }
+
+    auto reply = std::move(m_reply);
+    if (reply->error() != QNetworkReply::NoError)
+    {
+        QMessageBox::warning(this, tr("Could not load presets!"), tr("Could not load presets!") + "\n\n" + reply->errorString());
+        return;
+    }
+
+    try
+    {
+        auto result = json_converters::parsePresetsConfig(json_converters::loadJson(reply->readAll()));
+
+        if (!result.presets)
+            throw std::runtime_error("presets missing in response");
+
+        m_presetsModel.setPresets(std::move(*std::move(result).presets));
+
+        selectFirstPreset();
+    }
+    catch (const std::exception &e)
+    {
+        QMessageBox::warning(this, tr("error"), tr("error") + "\n\n" + QString::fromStdString(e.what()));
+    }
+}
diff --git a/drumpadwidget.h b/drumpadwidget.h
new file mode 100644
index 0000000..c46e6ef
--- /dev/null
+++ b/drumpadwidget.h
@@ -0,0 +1,60 @@
+#pragma once
+
+#include <QSplitter>
+#include <QSortFilterProxyModel>
+
+#include <memory>
+
+#include "audioformat.h"
+#include "midicontainers.h"
+#include "presetsmodel.h"
+#include "filesmodel.h"
+
+namespace Ui { class DrumPadWidget; }
+class SamplesWidget;
+class SequencerWidget;
+class QModelIndex;
+class QNetworkAccessManager;
+class QThread;
+class DrumMachineSettings;
+class QNetworkReply;
+
+class DrumPadWidget : public QSplitter
+{
+    Q_OBJECT
+
+public:
+    explicit DrumPadWidget(QWidget *parent = nullptr);
+    ~DrumPadWidget() override;
+
+    void selectFirstPreset();
+    void writeSamples(frame_t *begin, frame_t *end);
+    void injectNetworkAccessManager(QNetworkAccessManager &networkAccessManager);
+    void injectDecodingThread(QThread &thread);
+    void loadSettings(DrumMachineSettings &settings);
+    void unsendColors();
+    void sendColors();
+
+signals:
+    void sendMidi(const midi::MidiMessage &midiMsg);
+
+public slots:
+    void messageReceived(const midi::MidiMessage &message);
+
+private slots:
+    void currentRowChanged(const QModelIndex &current);
+    void loadPresets();
+    void requestFinished();
+
+private:
+    const std::unique_ptr<Ui::DrumPadWidget> m_ui;
+
+    PresetsModel m_presetsModel;
+    QSortFilterProxyModel m_presetsProxyModel;
+
+    FilesModel m_filesModel;
+
+    QNetworkAccessManager *m_networkAccessManager{};
+
+    std::unique_ptr<QNetworkReply> m_reply;
+};
diff --git a/drumpadwidget.ui b/drumpadwidget.ui
new file mode 100644
index 0000000..2119ad0
--- /dev/null
+++ b/drumpadwidget.ui
@@ -0,0 +1,108 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>DrumPadWidget</class>
+ <widget class="QSplitter">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>805</width>
+    <height>525</height>
+   </rect>
+  </property>
+  <property name="orientation">
+   <enum>Qt::Horizontal</enum>
+  </property>
+  <widget class="QWidget" name="layoutWidget">
+   <layout class="QVBoxLayout">
+    <item>
+     <layout class="QVBoxLayout">
+      <item>
+       <layout class="QHBoxLayout">
+        <item>
+         <widget class="QLineEdit" name="lineEdit">
+          <property name="clearButtonEnabled">
+           <bool>true</bool>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QPushButton" name="pushButtonRefresh">
+          <property name="maximumSize">
+           <size>
+            <width>32</width>
+            <height>16777215</height>
+           </size>
+          </property>
+          <property name="text">
+           <string>↻</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <widget class="QTreeView" name="presetsView">
+        <property name="rootIsDecorated">
+         <bool>false</bool>
+        </property>
+        <property name="sortingEnabled">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
+    <item>
+     <widget class="QTabWidget" name="tabWidget">
+      <property name="currentIndex">
+       <number>2</number>
+      </property>
+      <widget class="PresetDetailWidget" name="presetDetailWidget">
+       <attribute name="title">
+        <string>Properties</string>
+       </attribute>
+      </widget>
+      <widget class="QTreeView" name="filesView">
+       <property name="rootIsDecorated">
+        <bool>false</bool>
+       </property>
+       <attribute name="title">
+        <string>Samples</string>
+       </attribute>
+      </widget>
+     </widget>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QSplitter">
+  <property name="orientation">
+   <enum>Qt::Vertical</enum>
+  </property>
+   <widget class="SequencerWidget" name="sequencerWidget" />
+   <widget class="SamplesWidget" name="samplesWidget" />
+  </widget>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>SamplesWidget</class>
+   <extends>QWidget</extends>
+   <header>sampleswidget.h</header>
+   <container>1</container>
+  </customwidget>
+  <customwidget>
+   <class>PresetDetailWidget</class>
+   <extends>QScrollArea</extends>
+   <header>presetdetailwidget.h</header>
+   <container>1</container>
+  </customwidget>
+  <customwidget>
+   <class>SequencerWidget</class>
+   <extends>QWidget</extends>
+   <header>sequencerwidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/main.cpp b/main.cpp
index c2f48c9..741d6a8 100755
--- a/main.cpp
+++ b/main.cpp
@@ -1,17 +1,10 @@
 #include <QApplication>
 #include <QSslSocket>
-#include <QNetworkAccessManager>
-#include <QNetworkRequest>
-#include <QNetworkReply>
-#include <QEventLoop>
-#include <QSplashScreen>
-#include <QMessageBox>
-#include <QNetworkDiskCache>
 #include <QDebug>
+#include <QMessageBox>
 
 #include "portaudio.h"
 
-#include "jsonconverters.h"
 #include "mainwindow.h"
 
 namespace {
@@ -58,7 +51,6 @@ int main(int argc, char *argv[])
     }
 
     auto helper0 = makeCleanupHelper([](){
-        qDebug() << "helper0";
         if (PaError err = Pa_Terminate(); err != paNoError)
             fprintf(stderr, "Could not terminate PortAudio!\n");
     });
@@ -74,39 +66,6 @@ int main(int argc, char *argv[])
                        "%{function}(): "
                        "%{message}");
 
-    presets::PresetsConfig presetsConfig;
-
-    {
-        QSplashScreen splashScreen{QPixmap{":/drummachine/splashscreen.png"}};
-        splashScreen.showMessage(QCoreApplication::translate("main", "Loading list of presets..."));
-        splashScreen.show();
-
-        QEventLoop eventLoop;
-
-        QNetworkAccessManager manager;
-
-        QNetworkDiskCache cache;
-        cache.setCacheDirectory("cache");
-
-        manager.setCache(&cache);
-
-        QNetworkRequest request{QUrl{"https://brunner.ninja/komposthaufen/dpm/presets_config_v12.json"}};
-        request.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache);
-        request.setAttribute(QNetworkRequest::CacheSaveControlAttribute, true);
-
-        const auto reply = std::unique_ptr<QNetworkReply>(manager.get(request));
-        QObject::connect(reply.get(), &QNetworkReply::finished, &eventLoop, &QEventLoop::quit);
-        eventLoop.exec();
-
-        if (reply->error() != QNetworkReply::NoError)
-        {
-            QMessageBox::warning(nullptr, QCoreApplication::translate("main", "Could not load presets!"), QCoreApplication::translate("main", "Could not load presets!") + "\n\n" + reply->errorString());
-            return 1;
-        }
-
-        presetsConfig = json_converters::parsePresetsConfig(json_converters::loadJson(reply->readAll()));
-    }
-
 #if !defined(Q_OS_WIN)
     QPalette darkPalette;
     darkPalette.setColor(QPalette::Window, QColor(53,53,53));
@@ -127,9 +86,8 @@ int main(int argc, char *argv[])
     app.setStyleSheet("QToolTip { color: #ffffff; background-color: #2a82da; border: 1px solid white; }");
 #endif
 
-    MainWindow mainWindow{presetsConfig};
-    mainWindow.showMaximized();
-    mainWindow.selectFirstPreset();
+    MainWindow mainWindow;
+    mainWindow.show();
 
     return app.exec();
 }
diff --git a/mainwindow.cpp b/mainwindow.cpp
index cf644f8..91fb165 100755
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -12,56 +12,34 @@
 #include "presets.h"
 #include "midiinwrapper.h"
 #include "midicontainers.h"
+#include "sampleswidget.h"
+#include "sequencerwidget.h"
 
 namespace {
-void DummyDeleter(PaStream *stream)
-{
-    Q_UNUSED(stream);
-}
-void PaStreamCloser(PaStream *stream)
-{
-    if (PaError err = Pa_CloseStream(stream); err != paNoError)
-        fprintf(stderr, "Could not close stream!\n");
-}
-void PaStreamStopperAndCloser(PaStream *stream)
-{
-    if (PaError err = Pa_StopStream(stream); err != paNoError)
-        fprintf(stderr, "Could not stop stream!\n");
-    PaStreamCloser(stream);
-}
-
-void paStreamFinished(void* userData)
-{
-    printf("Stream Completed\n");
-}
-
+void DummyDeleter(PaStream *stream);
+void PaStreamCloser(PaStream *stream);
+void PaStreamStopperAndCloser(PaStream *stream);
+void paStreamFinished(void* userData);
 int paCallback(const void *inputBuffer, void *outputBuffer,
                unsigned long framesPerBuffer,
                const PaStreamCallbackTimeInfo* timeInfo,
                PaStreamCallbackFlags statusFlags,
-               void *userData)
-{
-    Q_UNUSED(inputBuffer)
-    Q_ASSERT(outputBuffer);
-    Q_ASSERT(framesPerBuffer);
-    Q_UNUSED(timeInfo)
-    Q_UNUSED(statusFlags)
-    Q_ASSERT(userData);
+               void *userData);
+} // namespace
 
-    auto begin = static_cast<frame_t*>(outputBuffer);
-
-    static_cast<MainWindow*>(userData)->writeSamples(begin, begin+framesPerBuffer);
-}
-}
-
-MainWindow::MainWindow(const presets::PresetsConfig &presetsConfig, QWidget *parent) :
+MainWindow::MainWindow(QWidget *parent) :
     QMainWindow{parent},
     m_ui{std::make_unique<Ui::MainWindow>()},
     m_paStream{nullptr, DummyDeleter},
-    m_presetsModel{*presetsConfig.presets}
+    m_midiIn{RtMidi::UNSPECIFIED, "DrumMachine"},
+    m_midiOut{RtMidi::UNSPECIFIED, "DrumMachine"}
 {
     m_ui->setupUi(this);
-    m_ui->splitter->setSizes({99999, 1});
+
+    m_cache.setCacheDirectory("cache");
+    m_networkAccessManager.setCache(&m_cache);
+
+    m_ui->drumPadWidget->injectNetworkAccessManager(m_networkAccessManager);
 
     connect(&m_midiIn, &MidiInWrapper::messageReceived, this, &MainWindow::messageReceived);
 
@@ -72,11 +50,9 @@ MainWindow::MainWindow(const presets::PresetsConfig &presetsConfig, QWidget *par
         eventLoop.exec();
     }
 
-    m_ui->samplesWidget->injectDecodingThread(m_decoderThread);
+    m_ui->drumPadWidget->injectDecodingThread(m_decoderThread);
     m_ui->djWidget->injectDecodingThread(m_decoderThread);
 
-    connect(m_ui->sequencerWidget, &SequencerWidget::triggerSample, m_ui->samplesWidget, &SamplesWidget::sequencerTriggerSample);
-
     updateMidiInDevices();
 
     updateMidiOutDevices();
@@ -92,7 +68,7 @@ MainWindow::MainWindow(const presets::PresetsConfig &presetsConfig, QWidget *par
         {
             const auto index = m_ui->comboBoxMidiIn->currentIndex();
             if (index != -1)
-                m_midiIn.openPort(index, "DrumMachine");
+                m_midiIn.openPort(index, "Input");
         }
 
         m_ui->comboBoxMidiIn->setDisabled(m_midiIn.isPortOpen());
@@ -103,6 +79,7 @@ MainWindow::MainWindow(const presets::PresetsConfig &presetsConfig, QWidget *par
         if (m_midiOut.isPortOpen())
         {
             qDebug() << "closing port";
+            unsendColors(m_ui->tabWidget->currentIndex());
             m_midiOut.closePort();
         }
         else
@@ -110,8 +87,8 @@ MainWindow::MainWindow(const presets::PresetsConfig &presetsConfig, QWidget *par
             const auto index = m_ui->comboBoxMidiOut->currentIndex();
             if (index != -1)
             {
-                m_midiOut.openPort(index, "DrumMachine");
-                sendColors();
+                m_midiOut.openPort(index, "Output");
+                sendColors(m_ui->tabWidget->currentIndex());
             }
         }
 
@@ -127,22 +104,14 @@ MainWindow::MainWindow(const presets::PresetsConfig &presetsConfig, QWidget *par
 
     connect(m_ui->pushButtonAudioDevice, &QAbstractButton::pressed, this, &MainWindow::openAudioDevice);
 
-    m_presetsProxyModel.setFilterCaseSensitivity(Qt::CaseInsensitive);
-    m_presetsProxyModel.setSortRole(Qt::EditRole);
-    m_presetsProxyModel.setSourceModel(&m_presetsModel);
-    m_ui->presetsView->setModel(&m_presetsProxyModel);
-
-    m_presetsProxyModel.setFilterKeyColumn(1);
-
-    connect(m_ui->lineEdit, &QLineEdit::textChanged, &m_presetsProxyModel, &QSortFilterProxyModel::setFilterFixedString);
-
-    m_ui->filesView->setModel(&m_filesModel);
-
-    connect(m_ui->presetsView->selectionModel(), &QItemSelectionModel::currentRowChanged, this, &MainWindow::currentRowChanged);
-
     loadSettings();
 
-    connect(m_ui->samplesWidget, &SamplesWidget::sendMidi, this, &MainWindow::sendMidi);
+    connect(m_ui->drumPadWidget, &DrumPadWidget::sendMidi, this, &MainWindow::sendMidi);
+    connect(m_ui->djWidget, &DjWidget::sendMidi, this, &MainWindow::sendMidi);
+    connect(m_ui->synthisizerWidget, &SynthisizerWidget::sendMidi, this, &MainWindow::sendMidi);
+
+    m_lastIndex = m_ui->tabWidget->currentIndex();
+    connect(m_ui->tabWidget, &QTabWidget::currentChanged, this, &MainWindow::currentChanged);
 }
 
 MainWindow::~MainWindow()
@@ -151,26 +120,13 @@ MainWindow::~MainWindow()
     m_decoderThread.wait();
 }
 
-void MainWindow::selectFirstPreset()
-{
-    if (m_presetsProxyModel.rowCount())
-    {
-        const auto index = m_presetsProxyModel.index(0, 0);
-        if (index.isValid())
-        {
-            m_ui->presetsView->selectionModel()->select(index, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
-            currentRowChanged(index);
-        }
-    }
-}
-
-void MainWindow::writeSamples(frame_t *begin, frame_t *end)
+int MainWindow::writeSamples(frame_t *begin, frame_t *end)
 {
     std::fill(begin, end, frame_t{0.,0.});
 
-    m_ui->samplesWidget->writeSamples(begin, end);
+    m_ui->drumPadWidget->writeSamples(begin, end);
     m_ui->djWidget->writeSamples(begin, end);
-    m_synthisizer.writeSamples(begin, end);
+    m_ui->synthisizerWidget->writeSamples(begin, end);
 
     std::transform(begin, end, begin, [factor=float(m_ui->horizontalSliderMaster->value())/100.f](frame_t frame){
         std::transform(std::cbegin(frame), std::cend(frame), std::begin(frame), [&factor](const sample_t &sample){
@@ -178,6 +134,8 @@ void MainWindow::writeSamples(frame_t *begin, frame_t *end)
         });
         return frame;
     });
+
+    return paContinue;
 }
 
 void MainWindow::openAudioDevice()
@@ -242,23 +200,12 @@ void MainWindow::messageReceived(const midi::MidiMessage &message)
                                  .arg(message.flag?"true":"false", QMetaEnum::fromType<midi::Command>().valueToKey(int(message.cmd)))
                                  .arg(message.channel).arg(message.note).arg(message.velocity), 1000);
 
-    if (m_ui->comboBoxMidiType->currentIndex() == 0)
-        m_ui->samplesWidget->messageReceived(message);
-    else if (m_ui->comboBoxMidiType->currentIndex() == 1)
-        m_synthisizer.messageReceived(message);
-}
-
-void MainWindow::currentRowChanged(const QModelIndex &current)
-{
-    if (!current.isValid())
-        return;
-
-    const auto &preset = m_presetsModel.getPreset(m_presetsProxyModel.mapToSource(current));
-
-    m_ui->presetDetailWidget->setPreset(preset);
-    m_filesModel.setPreset(preset);
-    m_ui->sequencerWidget->setPreset(preset);
-    m_ui->samplesWidget->setPreset(preset);
+    if (m_ui->tabWidget->currentIndex() == 0)
+        m_ui->drumPadWidget->messageReceived(message);
+    else if (m_ui->tabWidget->currentIndex() == 1)
+        m_ui->djWidget->messageReceived(message);
+    else if (m_ui->tabWidget->currentIndex() == 2)
+        m_ui->synthisizerWidget->messageReceived(message);
 }
 
 void MainWindow::sendMidi(const midi::MidiMessage &midiMsg)
@@ -267,6 +214,13 @@ void MainWindow::sendMidi(const midi::MidiMessage &midiMsg)
         m_midiOut.sendMessage(midiMsg);
 }
 
+void MainWindow::currentChanged(int index)
+{
+    unsendColors(m_lastIndex);
+    m_lastIndex = index;
+    sendColors(index);
+}
+
 void MainWindow::updateMidiInDevices()
 {
     m_ui->comboBoxMidiIn->clear();
@@ -302,15 +256,34 @@ void MainWindow::updateAudioDevices()
 
 void MainWindow::loadSettings()
 {
-    m_synthisizer.loadSettings(m_settings);
-    m_ui->samplesWidget->loadSettings(m_settings);
+    m_ui->drumPadWidget->loadSettings(m_settings);
+    m_ui->djWidget->loadSettings(m_settings);
+    m_ui->synthisizerWidget->loadSettings(m_settings);
 }
 
-void MainWindow::sendColors()
+void MainWindow::unsendColors(int index)
 {
-    m_ui->samplesWidget->sendColors();
+    if (index == 0)
+        m_ui->drumPadWidget->unsendColors();
+    else if (index == 1)
+        m_ui->djWidget->unsendColors();
+    else if (index == 2)
+        m_ui->synthisizerWidget->unsendColors();
+}
+
+void MainWindow::sendColors(int index)
+{
+    if (index == 0)
+        m_ui->drumPadWidget->sendColors();
+    else if (index == 1)
+        m_ui->djWidget->sendColors();
+    else if (index == 2)
+        m_ui->synthisizerWidget->sendColors();
+
     return;
 
+    // this was just for debugging all the available colors on novation launchpad mk1
+
     int k{0};
     for (int j = 0; j < 128; j+= 16)
     {
@@ -327,3 +300,44 @@ void MainWindow::sendColors()
         }
     }
 }
+
+namespace {
+void DummyDeleter(PaStream *stream)
+{
+    Q_UNUSED(stream);
+}
+void PaStreamCloser(PaStream *stream)
+{
+    if (PaError err = Pa_CloseStream(stream); err != paNoError)
+        fprintf(stderr, "Could not close stream!\n");
+}
+void PaStreamStopperAndCloser(PaStream *stream)
+{
+    if (PaError err = Pa_StopStream(stream); err != paNoError)
+        fprintf(stderr, "Could not stop stream!\n");
+    PaStreamCloser(stream);
+}
+
+void paStreamFinished(void* userData)
+{
+    printf("Stream Completed\n");
+}
+
+int paCallback(const void *inputBuffer, void *outputBuffer,
+               unsigned long framesPerBuffer,
+               const PaStreamCallbackTimeInfo* timeInfo,
+               PaStreamCallbackFlags statusFlags,
+               void *userData)
+{
+    Q_UNUSED(inputBuffer)
+    Q_ASSERT(outputBuffer);
+    Q_ASSERT(framesPerBuffer);
+    Q_UNUSED(timeInfo)
+    Q_UNUSED(statusFlags)
+    Q_ASSERT(userData);
+
+    auto begin = static_cast<frame_t*>(outputBuffer);
+
+    return static_cast<MainWindow*>(userData)->writeSamples(begin, begin+framesPerBuffer);
+}
+} // namespace
diff --git a/mainwindow.h b/mainwindow.h
index 3d3c1da..27cd9e8 100755
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -3,17 +3,15 @@
 #include <memory>
 
 #include <QMainWindow>
-#include <QSortFilterProxyModel>
 #include <QThread>
+#include <QNetworkAccessManager>
+#include <QNetworkDiskCache>
 
 #include "portaudio.h"
 
 #include "audioformat.h"
-#include "presetsmodel.h"
-#include "filesmodel.h"
 #include "midiinwrapper.h"
 #include "midioutwrapper.h"
-#include "synthisizer.h"
 #include "drummachinesettings.h"
 
 namespace Ui { class MainWindow; }
@@ -25,25 +23,24 @@ class MainWindow : public QMainWindow
     Q_OBJECT
 
 public:
-    explicit MainWindow(const presets::PresetsConfig &presetsConfig, QWidget *parent = nullptr);
+    explicit MainWindow(QWidget *parent = nullptr);
     ~MainWindow() override;
 
-    void selectFirstPreset();
-
-    void writeSamples(frame_t *begin, frame_t *end);
+    int writeSamples(frame_t *begin, frame_t *end);
 
 private slots:
     void openAudioDevice();
     void messageReceived(const midi::MidiMessage &message);
-    void currentRowChanged(const QModelIndex &current);
     void sendMidi(const midi::MidiMessage &midiMsg);
+    void currentChanged(int index);
 
 private:
     void updateMidiInDevices();
     void updateMidiOutDevices();
     void updateAudioDevices();
     void loadSettings();
-    void sendColors();
+    void unsendColors(int index);
+    void sendColors(int index);
 
     const std::unique_ptr<Ui::MainWindow> m_ui;
 
@@ -54,12 +51,10 @@ private:
     MidiInWrapper m_midiIn;
     MidiOutWrapper m_midiOut;
 
+    QNetworkAccessManager m_networkAccessManager;
+    QNetworkDiskCache m_cache;
+
     QThread m_decoderThread;
 
-    Synthisizer m_synthisizer;
-
-    PresetsModel m_presetsModel;
-    QSortFilterProxyModel m_presetsProxyModel;
-
-    FilesModel m_filesModel;
+    int m_lastIndex;
 };
diff --git a/mainwindow.ui b/mainwindow.ui
index 3f90aee..5ece7c0 100755
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -14,7 +14,7 @@
    <string>MainWindow</string>
   </property>
   <widget class="QWidget" name="widget">
-   <layout class="QVBoxLayout" stretch="0,1">
+   <layout class="QVBoxLayout" stretch="0,0,0">
     <property name="leftMargin">
      <number>0</number>
     </property>
@@ -91,6 +91,43 @@
         </property>
        </spacer>
       </item>
+      <item>
+       <widget class="QComboBox" name="comboBoxAudioDevice"/>
+      </item>
+      <item>
+       <widget class="QPushButton" name="pushButtonRefreshAudioDevices">
+        <property name="maximumSize">
+         <size>
+          <width>32</width>
+          <height>16777215</height>
+         </size>
+        </property>
+        <property name="text">
+         <string>↻</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QSpinBox" name="spinBoxBufferSize">
+        <property name="maximum">
+         <number>65535</number>
+        </property>
+        <property name="value">
+         <number>32</number>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QPushButton" name="pushButtonAudioDevice">
+        <property name="text">
+         <string>Open</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
+    <item>
+     <layout class="QHBoxLayout" name="horizontalLayout">
       <item>
        <widget class="QLabel" name="labelMidiIn">
         <property name="text">
@@ -121,20 +158,6 @@
         </property>
        </widget>
       </item>
-      <item>
-       <widget class="QComboBox" name="comboBoxMidiType">
-        <item>
-         <property name="text">
-          <string>Samples</string>
-         </property>
-        </item>
-        <item>
-         <property name="text">
-          <string>Synthisizer</string>
-         </property>
-        </item>
-       </widget>
-      </item>
       <item>
        <spacer name="horizontalSpacer_2">
         <property name="orientation">
@@ -178,139 +201,24 @@
         </property>
        </widget>
       </item>
-      <item>
-       <spacer name="horizontalSpacer">
-        <property name="orientation">
-         <enum>Qt::Horizontal</enum>
-        </property>
-        <property name="sizeHint" stdset="0">
-         <size>
-          <width>40</width>
-          <height>20</height>
-         </size>
-        </property>
-       </spacer>
-      </item>
-      <item>
-       <widget class="QComboBox" name="comboBoxAudioDevice"/>
-      </item>
-      <item>
-       <widget class="QPushButton" name="pushButtonRefreshAudioDevices">
-        <property name="maximumSize">
-         <size>
-          <width>32</width>
-          <height>16777215</height>
-         </size>
-        </property>
-        <property name="text">
-         <string>↻</string>
-        </property>
-       </widget>
-      </item>
-      <item>
-       <widget class="QSpinBox" name="spinBoxBufferSize">
-        <property name="maximum">
-         <number>65535</number>
-        </property>
-        <property name="value">
-         <number>32</number>
-        </property>
-       </widget>
-      </item>
-      <item>
-       <widget class="QPushButton" name="pushButtonAudioDevice">
-        <property name="text">
-         <string>Open</string>
-        </property>
-       </widget>
-      </item>
      </layout>
     </item>
     <item>
-     <widget class="QSplitter" name="splitter">
-      <property name="orientation">
-       <enum>Qt::Horizontal</enum>
-      </property>
-      <widget class="QSplitter" name="splitter_2">
-       <property name="orientation">
-        <enum>Qt::Vertical</enum>
-       </property>
-       <widget class="QWidget" name="layoutWidget">
-        <layout class="QVBoxLayout">
-         <item>
-          <layout class="QHBoxLayout">
-           <item>
-            <widget class="QLineEdit" name="lineEdit">
-             <property name="clearButtonEnabled">
-              <bool>true</bool>
-             </property>
-            </widget>
-           </item>
-           <item>
-            <spacer>
-             <property name="orientation">
-              <enum>Qt::Horizontal</enum>
-             </property>
-             <property name="sizeHint" stdset="0">
-              <size>
-               <width>40</width>
-               <height>20</height>
-              </size>
-             </property>
-            </spacer>
-           </item>
-           <item>
-            <widget class="QPushButton" name="selectRandomPushButton">
-             <property name="text">
-              <string>Select random</string>
-             </property>
-            </widget>
-           </item>
-          </layout>
-         </item>
-         <item>
-          <widget class="QSplitter" name="splitter">
-           <property name="orientation">
-            <enum>Qt::Horizontal</enum>
-           </property>
-           <widget class="QTreeView" name="presetsView">
-            <property name="rootIsDecorated">
-             <bool>false</bool>
-            </property>
-            <property name="sortingEnabled">
-             <bool>true</bool>
-            </property>
-           </widget>
-           <widget class="QTabWidget" name="tabWidget">
-            <widget class="PresetDetailWidget" name="presetDetailWidget">
-             <attribute name="title">
-              <string>Properties</string>
-             </attribute>
-            </widget>
-            <widget class="QTreeView" name="filesView">
-             <property name="rootIsDecorated">
-              <bool>false</bool>
-             </property>
-             <attribute name="title">
-              <string>Samples</string>
-             </attribute>
-            </widget>
-           </widget>
-          </widget>
-         </item>
-        </layout>
-       </widget>
-       <widget class="DjWidget" name="djWidget" native="true"/>
+     <widget class="QTabWidget" name="tabWidget">
+      <widget class="DrumPadWidget" name="drumPadWidget">
+       <attribute name="title">
+        <string>DrumPad</string>
+       </attribute>
       </widget>
-      <widget class="QWidget" name="layoutWidget">
-       <layout class="QVBoxLayout" stretch="1,0">
-        <item>
-         <widget class="SequencerWidget" name="sequencerWidget" native="true"/>
-        </item>
-        <item>
-         <widget class="SamplesWidget" name="samplesWidget" native="true"/>
-        </item>
-       </layout>
+      <widget class="DjWidget" name="djWidget">
+       <attribute name="title">
+        <string>DJ</string>
+       </attribute>
+      </widget>
+      <widget class="SynthisizerWidget" name="synthisizerWidget">
+       <attribute name="title">
+        <string>Synthisizer</string>
+       </attribute>
       </widget>
      </widget>
     </item>
@@ -329,30 +237,24 @@
   <widget class="QStatusBar" name="statusbar"/>
  </widget>
  <customwidgets>
-  <customwidget>
-   <class>SamplesWidget</class>
-   <extends>QWidget</extends>
-   <header>sampleswidget.h</header>
-   <container>1</container>
-  </customwidget>
-  <customwidget>
-   <class>PresetDetailWidget</class>
-   <extends>QScrollArea</extends>
-   <header>presetdetailwidget.h</header>
-   <container>1</container>
-  </customwidget>
-  <customwidget>
-   <class>SequencerWidget</class>
-   <extends>QWidget</extends>
-   <header>sequencerwidget.h</header>
-   <container>1</container>
-  </customwidget>
   <customwidget>
    <class>DjWidget</class>
    <extends>QWidget</extends>
    <header>djwidget.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>DrumPadWidget</class>
+   <extends>QWidget</extends>
+   <header>drumpadwidget.h</header>
+   <container>1</container>
+  </customwidget>
+  <customwidget>
+   <class>SynthisizerWidget</class>
+   <extends>QWidget</extends>
+   <header>synthisizerwidget.h</header>
+   <container>1</container>
+  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
diff --git a/midiinwrapper.h b/midiinwrapper.h
index 9f1c117..6f19f34 100755
--- a/midiinwrapper.h
+++ b/midiinwrapper.h
@@ -13,9 +13,9 @@ class MidiInWrapper : public QObject
 
 public:
     MidiInWrapper(RtMidi::Api api = RtMidi::UNSPECIFIED,
-                const QString &clientName = "RtMidi Input Client",
-                unsigned int queueSizeLimit = 100,
-                QObject *parent = nullptr);
+                  const QString &clientName = "RtMidi Input Client",
+                  unsigned int queueSizeLimit = 100,
+                  QObject *parent = nullptr);
 
     void openPort(unsigned int portNumber, const QString &portName);
     void openVirtualPort(const QString &portName);
diff --git a/presetsmodel.cpp b/presetsmodel.cpp
index 0c7e5d2..d710351 100755
--- a/presetsmodel.cpp
+++ b/presetsmodel.cpp
@@ -32,6 +32,11 @@ enum {
     NumberOfColumns
 };
 
+PresetsModel::PresetsModel(QObject *parent) :
+    QAbstractTableModel{parent}
+{
+}
+
 PresetsModel::PresetsModel(const std::map<QString, presets::Preset> &presets, QObject *parent) :
     QAbstractTableModel{parent}
 {
@@ -40,8 +45,44 @@ PresetsModel::PresetsModel(const std::map<QString, presets::Preset> &presets, QO
         m_presets.emplace_back(pair.second);
 }
 
+PresetsModel::PresetsModel(std::vector<presets::Preset> &&presets, QObject *parent) :
+    QAbstractTableModel{parent}
+{
+    m_presets = std::move(presets);
+}
+
+PresetsModel::PresetsModel(const std::vector<presets::Preset> &presets, QObject *parent) :
+    QAbstractTableModel{parent}
+{
+    m_presets = presets;
+}
+
 PresetsModel::~PresetsModel() = default;
 
+void PresetsModel::setPresets(const std::map<QString, presets::Preset> &presets)
+{
+    beginResetModel();
+    m_presets.clear();
+    m_presets.reserve(std::size(presets));
+    for (const auto &pair : presets)
+        m_presets.emplace_back(pair.second);
+    endResetModel();
+}
+
+void PresetsModel::setPresets(std::vector<presets::Preset> &&presets)
+{
+    beginResetModel();
+    m_presets = std::move(presets);
+    endResetModel();
+}
+
+void PresetsModel::setPresets(const std::vector<presets::Preset> &presets)
+{
+    beginResetModel();
+    m_presets = presets;
+    endResetModel();
+}
+
 const presets::Preset &PresetsModel::getPreset(const QModelIndex &index) const
 {
     return getPreset(index.row());
diff --git a/presetsmodel.h b/presetsmodel.h
index ecbd711..8778dfc 100755
--- a/presetsmodel.h
+++ b/presetsmodel.h
@@ -11,9 +11,16 @@ class PresetsModel : public QAbstractTableModel
     Q_OBJECT
 
 public:
+    PresetsModel(QObject *parent = nullptr);
     PresetsModel(const std::map<QString, presets::Preset> &presets, QObject *parent = nullptr);
+    PresetsModel(std::vector<presets::Preset> &&presets, QObject *parent = nullptr);
+    PresetsModel(const std::vector<presets::Preset> &presets, QObject *parent = nullptr);
     ~PresetsModel() override;
 
+    void setPresets(const std::map<QString, presets::Preset> &presets);
+    void setPresets(std::vector<presets::Preset> &&presets);
+    void setPresets(const std::vector<presets::Preset> &presets);
+
     const presets::Preset &getPreset(const QModelIndex &index) const;
     const presets::Preset &getPreset(int row) const;
 
diff --git a/sampleswidget.cpp b/sampleswidget.cpp
index 646b52d..245a5d7 100755
--- a/sampleswidget.cpp
+++ b/sampleswidget.cpp
@@ -13,9 +13,6 @@ SamplesWidget::SamplesWidget(QWidget *parent) :
 {
     m_ui->setupUi(this);
 
-    m_cache.setCacheDirectory("cache");
-    m_networkAccessManager.setCache(&m_cache);
-
     connect(m_ui->checkBox, &QCheckBox::toggled, this, &SamplesWidget::updateWidgets);
 
     connect(m_ui->pushButtonStopAll, &QAbstractButton::pressed, this, &SamplesWidget::stopAll);
@@ -24,7 +21,6 @@ SamplesWidget::SamplesWidget(QWidget *parent) :
     for (SampleWidget &widget : getWidgets())
     {
         widget.setPadNr(padNr++);
-        widget.injectNetworkAccessManager(m_networkAccessManager);
         connect(&widget, &SampleWidget::chokeTriggered, this, &SamplesWidget::chokeTriggered);
         connect(&widget, &SampleWidget::sendMidi, this, &SamplesWidget::sendMidi);
     }
@@ -78,12 +74,24 @@ void SamplesWidget::writeSamples(frame_t *begin, frame_t *end)
         widget.writeSamples(begin, end);
 }
 
+void SamplesWidget::injectNetworkAccessManager(QNetworkAccessManager &networkAccessManager)
+{
+    for (SampleWidget &widget : getWidgets())
+        widget.injectNetworkAccessManager(networkAccessManager);
+}
+
 void SamplesWidget::injectDecodingThread(QThread &thread)
 {
     for (SampleWidget &widget : getWidgets())
         widget.injectDecodingThread(thread);
 }
 
+void SamplesWidget::unsendColors()
+{
+    for (SampleWidget &widget : getWidgets())
+        widget.unsendColor();
+}
+
 void SamplesWidget::sendColors()
 {
     for (SampleWidget &widget : getWidgets())
diff --git a/sampleswidget.h b/sampleswidget.h
index b700f78..8917cb2 100755
--- a/sampleswidget.h
+++ b/sampleswidget.h
@@ -5,14 +5,13 @@
 #include <functional>
 
 #include <QWidget>
-#include <QNetworkAccessManager>
-#include <QNetworkDiskCache>
 
 #include "audioformat.h"
 #include "presets.h"
 
 namespace Ui { class SamplesWidget; }
 namespace midi { class MidiMessage; }
+class QNetworkAccessManager;
 class SampleWidget;
 class DrumMachineSettings;
 
@@ -32,8 +31,10 @@ public:
 
     void writeSamples(frame_t *begin, frame_t *end);
 
+    void injectNetworkAccessManager(QNetworkAccessManager &networkAccessManager);
     void injectDecodingThread(QThread &thread);
 
+    void unsendColors();
     void sendColors();
 
 signals:
@@ -52,8 +53,5 @@ private:
 
     const std::unique_ptr<Ui::SamplesWidget> m_ui;
 
-    QNetworkDiskCache m_cache;
-    QNetworkAccessManager m_networkAccessManager;
-
     presets::Preset m_preset;
 };
diff --git a/samplewidget.cpp b/samplewidget.cpp
index 951b6f7..1f60203 100755
--- a/samplewidget.cpp
+++ b/samplewidget.cpp
@@ -183,6 +183,19 @@ void SampleWidget::learn(quint8 channel, quint8 note)
         learnPressed();
 }
 
+void SampleWidget::unsendColor()
+{
+    midi::MidiMessage midiMsg;
+
+    midiMsg.channel = m_ui->channelSpinBox->value();
+    midiMsg.cmd = midi::Command::NoteOn;
+    midiMsg.flag = true;
+    midiMsg.note = m_ui->noteSpinBox->value();
+    midiMsg.velocity = 0;
+
+    emit sendMidi(midiMsg);
+}
+
 void SampleWidget::sendColor()
 {
     midi::MidiMessage midiMsg;
diff --git a/samplewidget.h b/samplewidget.h
index 495d46f..a638f06 100755
--- a/samplewidget.h
+++ b/samplewidget.h
@@ -58,14 +58,14 @@ public:
     bool isLearning() const { return m_learning; }
     void learn(quint8 channel, quint8 note);
 
+    void unsendColor();
+    void sendColor();
+
 signals:
     void chokeTriggered(int choke);
     void startDecoding(const std::shared_ptr<QIODevice> &device);
     void sendMidi(const midi::MidiMessage &midiMsg);
 
-public slots:
-    void sendColor();
-
 private slots:
     void updateStatus();
     void requestFinished();
diff --git a/samplewidget.ui b/samplewidget.ui
index 28f4140..0ff0027 100755
--- a/samplewidget.ui
+++ b/samplewidget.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>400</width>
-    <height>300</height>
+    <width>140</width>
+    <height>157</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -63,8 +63,14 @@
     <layout class="QHBoxLayout" name="horizontalLayout_4">
      <item>
       <widget class="QPushButton" name="pushButton">
+       <property name="maximumSize">
+        <size>
+         <width>32</width>
+         <height>16777215</height>
+        </size>
+       </property>
        <property name="text">
-        <string>PushButton</string>
+        <string>▶</string>
        </property>
       </widget>
      </item>
@@ -119,9 +125,6 @@
        <property name="frameShadow">
         <enum>QFrame::Sunken</enum>
        </property>
-       <property name="text">
-        <string>TextLabel</string>
-       </property>
       </widget>
      </item>
      <item>
@@ -132,9 +135,6 @@
        <property name="frameShadow">
         <enum>QFrame::Sunken</enum>
        </property>
-       <property name="text">
-        <string>TextLabel</string>
-       </property>
       </widget>
      </item>
      <item>
@@ -145,9 +145,6 @@
        <property name="frameShadow">
         <enum>QFrame::Sunken</enum>
        </property>
-       <property name="text">
-        <string>TextLabel</string>
-       </property>
       </widget>
      </item>
     </layout>
diff --git a/sequencerwidget.h b/sequencerwidget.h
index d58f7dc..4614578 100755
--- a/sequencerwidget.h
+++ b/sequencerwidget.h
@@ -42,6 +42,6 @@ private:
 
     QTimer m_timer;
 
-    int m_pos;
+    int m_pos{};
     std::array<QLabel*, 24> m_sampleLabels;
 };
diff --git a/synthisizer.cpp b/synthisizer.cpp
index f740133..1021388 100644
--- a/synthisizer.cpp
+++ b/synthisizer.cpp
@@ -6,10 +6,6 @@
 
 constexpr double pi = std::acos(-1);
 
-void Synthisizer::loadSettings(const DrumMachineSettings &settings)
-{
-}
-
 void Synthisizer::writeSamples(frame_t *begin, frame_t *end)
 {
     const auto frequency = m_frequency;
diff --git a/synthisizer.h b/synthisizer.h
index 4d8a400..67b6f2d 100644
--- a/synthisizer.h
+++ b/synthisizer.h
@@ -9,14 +9,15 @@ class DrumMachineSettings;
 class Synthisizer
 {
 public:
-    void loadSettings(const DrumMachineSettings &settings);
-
     void setFrequency(int16_t frequency) { m_frequency = frequency; }
 
     void writeSamples(frame_t *begin, frame_t *end);
 
     void messageReceived(const midi::MidiMessage &message);
 
+signals:
+    void sendMidi(const midi::MidiMessage &midiMsg);
+
 private:
     int16_t m_frequency{};
     int16_t m_actualFrequency{};
diff --git a/synthisizerwidget.cpp b/synthisizerwidget.cpp
new file mode 100644
index 0000000..df87c08
--- /dev/null
+++ b/synthisizerwidget.cpp
@@ -0,0 +1,33 @@
+#include "synthisizerwidget.h"
+#include "ui_synthisizerwidget.h"
+
+SynthisizerWidget::SynthisizerWidget(QWidget *parent) :
+    QWidget{parent},
+    m_ui{std::make_unique<Ui::SynthisizerWidget>()}
+{
+    m_ui->setupUi(this);
+}
+
+SynthisizerWidget::~SynthisizerWidget() = default;
+
+void SynthisizerWidget::writeSamples(frame_t *begin, frame_t *end)
+{
+    m_synthisizer.writeSamples(begin, end);
+}
+
+void SynthisizerWidget::loadSettings(DrumMachineSettings &settings)
+{
+}
+
+void SynthisizerWidget::unsendColors()
+{
+}
+
+void SynthisizerWidget::sendColors()
+{
+}
+
+void SynthisizerWidget::messageReceived(const midi::MidiMessage &message)
+{
+    m_synthisizer.messageReceived(message);
+}
diff --git a/synthisizerwidget.h b/synthisizerwidget.h
new file mode 100644
index 0000000..4042e9c
--- /dev/null
+++ b/synthisizerwidget.h
@@ -0,0 +1,35 @@
+#pragma once
+
+#include <QWidget>
+#include <memory>
+
+#include "synthisizer.h"
+#include "audioformat.h"
+
+namespace Ui { class SynthisizerWidget; }
+class DrumMachineSettings;
+
+class SynthisizerWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit SynthisizerWidget(QWidget *parent = nullptr);
+    ~SynthisizerWidget() override;
+
+    void writeSamples(frame_t *begin, frame_t *end);
+    void loadSettings(DrumMachineSettings &settings);
+    void unsendColors();
+    void sendColors();
+
+signals:
+    void sendMidi(const midi::MidiMessage &midiMsg);
+
+public slots:
+    void messageReceived(const midi::MidiMessage &message);
+
+private:
+    const std::unique_ptr<Ui::SynthisizerWidget> m_ui;
+
+    Synthisizer m_synthisizer;
+};
diff --git a/synthisizerwidget.ui b/synthisizerwidget.ui
new file mode 100644
index 0000000..ea3b59d
--- /dev/null
+++ b/synthisizerwidget.ui
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>SynthisizerWidget</class>
+ <widget class="QWidget" name="SynthisizerWidget">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <widget class="QLabel" name="label">
+   <property name="geometry">
+    <rect>
+     <x>30</x>
+     <y>60</y>
+     <width>221</width>
+     <height>31</height>
+    </rect>
+   </property>
+   <property name="text">
+    <string>Hier könnte ihr Synthisizer stehen.</string>
+   </property>
+  </widget>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>