diff --git a/audioformat.h b/audioformat.h
new file mode 100644
index 0000000..ea8025e
--- /dev/null
+++ b/audioformat.h
@@ -0,0 +1,26 @@
+#pragma once
+
+#include <QAudioFormat>
+
+namespace {
+constexpr int frameRate = 44100;
+constexpr int channelCount = 2;
+constexpr int sampleSize = 32;
+constexpr auto codec = "audio/pcm";
+constexpr QAudioFormat::Endian byteOrder = QAudioFormat::LittleEndian;
+constexpr QAudioFormat::SampleType sampleType = QAudioFormat::Float;
+using sample_t = float;
+using frame_t = std::array<sample_t, channelCount>;
+
+auto makeFormat()
+{
+    QAudioFormat format;
+    format.setSampleRate(frameRate);
+    format.setChannelCount(channelCount);
+    format.setSampleSize(sampleSize);
+    format.setCodec(codec);
+    format.setByteOrder(byteOrder);
+    format.setSampleType(sampleType);
+    return format;
+}
+}
diff --git a/bpmdetector.cpp b/bpmdetector.cpp
new file mode 100644
index 0000000..6e30974
--- /dev/null
+++ b/bpmdetector.cpp
@@ -0,0 +1,32 @@
+#include "bpmdetector.h"
+
+// system includes
+#include <algorithm>
+
+// Qt includes
+#include <QDebug>
+
+BpmDetector::BpmDetector(QObject *parent) :
+    QIODevice{parent}
+{
+    setOpenMode(QIODevice::WriteOnly);
+}
+
+qint64 BpmDetector::readData(char *data, qint64 maxlen)
+{
+    qCritical("read not supported");
+    return -1;
+}
+
+qint64 BpmDetector::writeData(const char *data, qint64 len)
+{
+    QVector<frame_t> frames{int(len / sizeof(frame_t))};
+    frames.resize(len / sizeof(frame_t));
+
+    const auto begin = reinterpret_cast<const frame_t *>(data);
+    std::copy(begin, begin + frames.size(), std::begin(frames));
+
+    emit receivedFrames(frames);
+
+    return len;
+}
diff --git a/bpmdetector.h b/bpmdetector.h
new file mode 100644
index 0000000..9c06e4f
--- /dev/null
+++ b/bpmdetector.h
@@ -0,0 +1,22 @@
+#pragma once
+
+// Qt includes
+#include <QIODevice>
+#include <QVector>
+
+// local includes
+#include "audioformat.h"
+
+class BpmDetector : public QIODevice
+{
+    Q_OBJECT
+
+public:
+    explicit BpmDetector(QObject *parent = nullptr);
+
+    qint64 readData(char *data, qint64 maxlen) override;
+    qint64 writeData(const char *data, qint64 len) override;
+
+signals:
+    void receivedFrames(const QVector<frame_t> &frames);
+};
diff --git a/main.cpp b/main.cpp
index 8bfb909..f353051 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,14 +1,22 @@
-#include <QCoreApplication>
+#include <QApplication>
 #include <QDebug>
 #include <QTimer>
 #include <QJsonObject>
 #include <QJsonArray>
 
 #include "r3client.h"
+#include "mainwindow.h"
+
+#include <memory>
 
 int main(int argc, char *argv[])
 {
-    QCoreApplication a(argc, argv);
+    QApplication a(argc, argv);
+
+    MainWindow mainWindow;
+    mainWindow.show();
+
+    return a.exec();
 
     const auto arguments = [&](){
         auto arguments = a.arguments();
diff --git a/mainwindow.cpp b/mainwindow.cpp
new file mode 100644
index 0000000..c6d7012
--- /dev/null
+++ b/mainwindow.cpp
@@ -0,0 +1,272 @@
+#include "mainwindow.h"
+
+// system includes
+#include <algorithm>
+
+// Qt includes
+#include <QMetaEnum>
+#include <QJsonObject>
+#include <QJsonArray>
+#include <QDebug>
+#include <QAudioInput>
+#include <QJsonDocument>
+
+namespace {
+template<typename QEnum>
+QString enumToString(const QEnum value)
+{
+  return QMetaEnum::fromType<QEnum>().valueToKey(value);
+}
+}
+
+MainWindow::MainWindow(QWidget *parent) :
+    QMainWindow{parent}
+{
+    m_ui.setupUi(this);
+
+    connect(m_ui.connectButton, &QAbstractButton::pressed, this, &MainWindow::connectPressed);
+    connect(m_ui.disconnectButton, &QAbstractButton::pressed, this, &MainWindow::disconnectPressed);
+
+    connect(m_ui.lamp1OnButton, &QAbstractButton::pressed, this, [&](){ lightCmd("basiclight1", "on"); });
+    connect(m_ui.lamp1OffButton, &QAbstractButton::pressed, this, [&](){ lightCmd("basiclight1", "off"); });
+    connect(m_ui.lamp2OnButton, &QAbstractButton::pressed, this, [&](){ lightCmd("basiclight2", "on"); });
+    connect(m_ui.lamp2OffButton, &QAbstractButton::pressed, this, [&](){ lightCmd("basiclight2", "off"); });
+    connect(m_ui.lamp3OnButton, &QAbstractButton::pressed, this, [&](){ lightCmd("basiclight3", "on"); });
+    connect(m_ui.lamp3OffButton, &QAbstractButton::pressed, this, [&](){ lightCmd("basiclight3", "off"); });
+    connect(m_ui.lamp4OnButton, &QAbstractButton::pressed, this, [&](){ lightCmd("basiclight4", "on"); });
+    connect(m_ui.lamp4OffButton, &QAbstractButton::pressed, this, [&](){ lightCmd("basiclight4", "off"); });
+    connect(m_ui.lamp5OnButton, &QAbstractButton::pressed, this, [&](){ lightCmd("basiclight5", "on"); });
+    connect(m_ui.lamp5OffButton, &QAbstractButton::pressed, this, [&](){ lightCmd("basiclight5", "off"); });
+    connect(m_ui.lamp6OnButton, &QAbstractButton::pressed, this, [&](){ lightCmd("basiclight6", "on"); });
+    connect(m_ui.lamp6OffButton, &QAbstractButton::pressed, this, [&](){ lightCmd("basiclight6", "off"); });
+
+    connect(m_ui.toggleAllButton, &QAbstractButton::pressed, this, &MainWindow::toggleAllPressed);
+    connect(m_ui.discoLeftButton, &QAbstractButton::pressed, this, &MainWindow::discoLeftPressed);
+    connect(m_ui.discoRightButton, &QAbstractButton::pressed, this, &MainWindow::discoRightPressed);
+
+    connect(m_ui.bpmButton, &QAbstractButton::pressed, this, &MainWindow::bpmPressed);
+
+    connect(m_ui.openAudioDeviceButton, &QAbstractButton::pressed, this, &MainWindow::openAudioDevicePressed);
+    connect(m_ui.closeAudioDeviceButton, &QAbstractButton::pressed, this, &MainWindow::closeAudioDevicePressed);
+
+    connect(&m_client, &R3Client::connected, this, &MainWindow::connected);
+    connect(&m_client, &R3Client::disconnected, this, &MainWindow::disconnected);
+    connect(&m_client, &R3Client::error, this, &MainWindow::error);
+    connect(&m_client, &R3Client::statusReceived, this, &MainWindow::statusReceived);
+
+    updateAudioDevices();
+
+    m_timer.setTimerType(Qt::PreciseTimer);
+    connect(&m_timer, &QTimer::timeout, this, &MainWindow::bpmTimeout);
+
+    connect(m_ui.spinBox, &QSpinBox::valueChanged, &m_timer, qOverload<int>(&QTimer::setInterval));
+
+    connect(&m_detector, &BpmDetector::receivedFrames, this, &MainWindow::receivedFrames);
+
+    connect(&m_timer2, &QTimer::timeout, this, [&](){
+        const sample_t min = -m_min * 100;
+        m_ui.verticalSlider->setValue(min);
+        m_min = 0;
+
+        const sample_t max = m_max * 100;
+        m_ui.verticalSlider_2->setValue(max);
+        m_max = 0;
+
+        const sample_t avg = m_distanceSum / m_count * 100.;
+        m_ui.verticalSlider_3->setValue(avg);
+        m_distanceSum = 0.;
+        m_count = 0;
+
+        const auto selectedWert = [&](){
+            if (m_ui.radioButton->isChecked())
+                return min;
+            else if (m_ui.radioButton_2->isChecked())
+                return max;
+            else if (m_ui.radioButton_3->isChecked())
+                return avg;
+        }();
+
+        if (selectedWert > m_ui.verticalSlider_4->value())
+            switch (m_ui.comboBox->currentIndex())
+            {
+            case 0: discoLeftPressed(); break;
+            case 1: discoRightPressed(); break;
+            case 2: toggleAllPressed(); break;
+            }
+    });
+    m_timer2.start(1000/20);
+}
+
+MainWindow::~MainWindow() = default;
+
+void MainWindow::connectPressed()
+{
+    log("Connecting...");
+    m_client.open();
+}
+
+void MainWindow::disconnectPressed()
+{
+    log("Disconnecting...");
+    m_client.close();
+}
+
+void MainWindow::connected()
+{
+    log("Connected successfully!");
+}
+
+void MainWindow::disconnected()
+{
+    log("Disconnected!");
+}
+
+void MainWindow::error(QAbstractSocket::SocketError error)
+{
+    log(QString{"Error: %0"}.arg(enumToString(error)));
+}
+
+void MainWindow::statusReceived(const QString &ctx, const QJsonValue &jsonValue)
+{
+    qDebug() << jsonValue;
+    log(QString{"ctx=%0"}.arg(ctx));
+}
+
+void MainWindow::toggleAllPressed()
+{
+    lightCmd("basiclight1", m_toggleState ? "on" : "off");
+    lightCmd("basiclight2", m_toggleState ? "on" : "off");
+    lightCmd("basiclight3", m_toggleState ? "on" : "off");
+    lightCmd("basiclight4", m_toggleState ? "on" : "off");
+    lightCmd("basiclight5", m_toggleState ? "on" : "off");
+    lightCmd("basiclight6", m_toggleState ? "on" : "off");
+    m_toggleState = !m_toggleState;
+}
+
+void MainWindow::discoLeftPressed()
+{
+    if (m_discoState == 0)
+        m_discoState = 5;
+    else
+        m_discoState--;
+    updateDisco();
+}
+
+void MainWindow::discoRightPressed()
+{
+    if (m_discoState == 5)
+        m_discoState = 0;
+    else
+        m_discoState++;
+    updateDisco();
+}
+
+void MainWindow::bpmPressed()
+{
+    discoRightPressed();
+
+    if (m_bpmTap)
+    {
+        m_bpmTap->count++;
+        const auto elapsed = m_bpmTap->begin.msecsTo(QDateTime::currentDateTime());
+        m_bpmTap->msPerBeat = elapsed / m_bpmTap->count;
+        m_bpmTap->bpm = 60000 / m_bpmTap->msPerBeat;
+        m_ui.bpmButton->setText(QString{"%0 %1 BPM"}.arg(m_bpmTap->count).arg(m_bpmTap->bpm));
+        m_ui.spinBox->setValue(m_bpmTap->msPerBeat);
+        m_timer.start(m_bpmTap->msPerBeat);
+        m_bpmTap->flag = false;
+    }
+    else
+    {
+        m_timer.start(2000);
+        m_bpmTap = BpmTap{};
+    }
+}
+
+void MainWindow::openAudioDevicePressed()
+{
+    const auto index = m_ui.audioDeviceSelection->currentIndex();
+    if (index < 0 || index >= m_devices.count())
+        return;
+
+    m_input = std::make_unique<QAudioInput>(m_devices.at(index), makeFormat());
+    m_input->start(&m_detector);
+}
+
+void MainWindow::closeAudioDevicePressed()
+{
+    m_input = nullptr;
+}
+
+void MainWindow::bpmTimeout()
+{
+    if (m_bpmTap)
+    {
+        if (!m_bpmTap->flag)
+        {
+            m_bpmTap->flag = true;
+            return;
+        }
+
+        if (m_bpmTap->count)
+        {
+            qDebug() << "starting normal";
+            discoRightPressed();
+        }
+        else
+        {
+            m_ui.bpmButton->setText(tr("BPM tap"));
+            qDebug() << "aborted";
+            m_timer.stop();
+        }
+        m_bpmTap = std::nullopt;
+    }
+    else
+    {
+        qDebug() << "disco timer";
+        discoRightPressed();
+    }
+}
+
+void MainWindow::receivedFrames(const QVector<frame_t> &frames)
+{
+    for (const auto &frame : frames)
+    {
+        if (frame[0] < m_min)
+            m_min = frame[0];
+
+        if (frame[0] > m_max)
+            m_max = frame[0];
+
+        m_distanceSum += std::abs(frame[0]);
+        m_count++;
+    }
+}
+
+void MainWindow::log(const QString &msg)
+{
+    m_ui.logView->appendPlainText(QString{"%0 %1"}.arg(QDateTime::currentDateTime().toString(), msg));
+}
+
+void MainWindow::lightCmd(const QString &light, const QString &status)
+{
+    m_client.sendMQTT("action/GoLightCtrl/" + light, QJsonObject{ {"Action", status }});
+}
+
+void MainWindow::updateDisco()
+{
+    lightCmd("basiclight1", m_discoState == 0 ? "on" : "off");
+    lightCmd("basiclight2", m_discoState == 1 ? "on" : "off");
+    lightCmd("basiclight3", m_discoState == 2 ? "on" : "off");
+    lightCmd("basiclight4", m_discoState == 3 ? "on" : "off");
+    lightCmd("basiclight5", m_discoState == 4 ? "on" : "off");
+    lightCmd("basiclight6", m_discoState == 5 ? "on" : "off");
+}
+
+void MainWindow::updateAudioDevices()
+{
+    m_ui.audioDeviceSelection->clear();
+    m_devices = QAudioDeviceInfo::availableDevices(QAudio::AudioInput);
+    for (const auto &x : m_devices)
+        m_ui.audioDeviceSelection->addItem(x.deviceName());
+}
diff --git a/mainwindow.h b/mainwindow.h
new file mode 100644
index 0000000..52452f6
--- /dev/null
+++ b/mainwindow.h
@@ -0,0 +1,81 @@
+#pragma once
+
+// system includes
+#include <memory>
+#include <optional>
+
+// Qt includes
+#include <QMainWindow>
+#include <QAbstractSocket>
+#include <QDateTime>
+#include <QTimer>
+#include <QList>
+#include <QAudioDeviceInfo>
+
+// local includes
+#include "ui_mainwindow.h"
+#include "r3client.h"
+#include "bpmdetector.h"
+#include "audioformat.h"
+
+class QAudioInput;
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit MainWindow(QWidget *parent = nullptr);
+    ~MainWindow();
+
+private slots:
+    void connectPressed();
+    void disconnectPressed();
+
+    void connected();
+    void disconnected();
+    void error(QAbstractSocket::SocketError error);
+    void statusReceived(const QString &ctx, const QJsonValue &jsonValue);
+
+    void toggleAllPressed();
+    void discoLeftPressed();
+    void discoRightPressed();
+
+    void bpmPressed();
+
+    void openAudioDevicePressed();
+    void closeAudioDevicePressed();
+
+    void bpmTimeout();
+
+    void receivedFrames(const QVector<frame_t> &frames);
+
+private:
+    void log(const QString &msg);
+    void lightCmd(const QString &light, const QString &status);
+    void updateDisco();
+    void updateAudioDevices();
+
+private:
+    Ui::MainWindow m_ui;
+    R3Client m_client;
+
+    bool m_toggleState{};
+    uint8_t m_discoState{};
+
+    struct BpmTap { QDateTime begin{QDateTime::currentDateTime()}; int count{}; int msPerBeat, bpm; bool flag{}; };
+    std::optional<BpmTap> m_bpmTap;
+
+    QTimer m_timer;
+
+    QList<QAudioDeviceInfo> m_devices;
+    std::unique_ptr<QAudioInput> m_input;
+    BpmDetector m_detector;
+
+    sample_t m_min{}, m_max{};
+
+    double m_distanceSum{};
+    std::size_t m_count{};
+
+    QTimer m_timer2;
+};
diff --git a/mainwindow.ui b/mainwindow.ui
new file mode 100644
index 0000000..4eadfa4
--- /dev/null
+++ b/mainwindow.ui
@@ -0,0 +1,495 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>800</width>
+    <height>600</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <widget class="QPushButton" name="connectButton">
+    <property name="geometry">
+     <rect>
+      <x>70</x>
+      <y>30</y>
+      <width>80</width>
+      <height>23</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Connect</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="disconnectButton">
+    <property name="geometry">
+     <rect>
+      <x>160</x>
+      <y>30</y>
+      <width>80</width>
+      <height>23</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Disconnect</string>
+    </property>
+   </widget>
+   <widget class="QPlainTextEdit" name="logView">
+    <property name="geometry">
+     <rect>
+      <x>20</x>
+      <y>280</y>
+      <width>591</width>
+      <height>231</height>
+     </rect>
+    </property>
+    <property name="readOnly">
+     <bool>true</bool>
+    </property>
+   </widget>
+   <widget class="QWidget" name="gridLayoutWidget">
+    <property name="geometry">
+     <rect>
+      <x>120</x>
+      <y>60</y>
+      <width>481</width>
+      <height>201</height>
+     </rect>
+    </property>
+    <layout class="QGridLayout" name="gridLayout">
+     <item row="2" column="0">
+      <layout class="QVBoxLayout" name="verticalLayout_7">
+       <item>
+        <widget class="QLabel" name="lamp4Label">
+         <property name="text">
+          <string>Lamp 4</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="lamp4OnButton">
+         <property name="text">
+          <string>On</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="lamp4OffButton">
+         <property name="text">
+          <string>Off</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item row="0" column="0">
+      <layout class="QVBoxLayout" name="verticalLayout_3">
+       <item>
+        <widget class="QLabel" name="lamp1Label">
+         <property name="text">
+          <string>Lamp 1</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="lamp1OnButton">
+         <property name="text">
+          <string>On</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="lamp1OffButton">
+         <property name="text">
+          <string>Off</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item row="0" column="2">
+      <layout class="QVBoxLayout" name="verticalLayout_5">
+       <item>
+        <widget class="QLabel" name="lamp2Label">
+         <property name="text">
+          <string>Lamp 2</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="lamp2OnButton">
+         <property name="text">
+          <string>On</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="lamp2OffButton">
+         <property name="text">
+          <string>Off</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item row="2" column="2">
+      <layout class="QVBoxLayout" name="verticalLayout_9">
+       <item>
+        <widget class="QLabel" name="lamp5Label">
+         <property name="text">
+          <string>Lamp 5</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="lamp5OnButton">
+         <property name="text">
+          <string>On</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="lamp5OffButton">
+         <property name="text">
+          <string>Off</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item row="0" column="4">
+      <layout class="QVBoxLayout" name="verticalLayout_8">
+       <item>
+        <widget class="QLabel" name="lamp3Label">
+         <property name="text">
+          <string>Lamp 3</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="lamp3OnButton">
+         <property name="text">
+          <string>On</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="lamp3OffButton">
+         <property name="text">
+          <string>Off</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item row="2" column="4">
+      <layout class="QVBoxLayout" name="verticalLayout_10">
+       <item>
+        <widget class="QLabel" name="lamp6Label">
+         <property name="text">
+          <string>Lamp 6</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="lamp6OnButton">
+         <property name="text">
+          <string>On</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="lamp6OffButton">
+         <property name="text">
+          <string>Off</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item row="0" column="1">
+      <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 row="0" column="3">
+      <spacer name="horizontalSpacer_2">
+       <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 row="1" column="1">
+      <spacer name="verticalSpacer">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>40</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+    </layout>
+   </widget>
+   <widget class="QPushButton" name="discoLeftButton">
+    <property name="geometry">
+     <rect>
+      <x>620</x>
+      <y>130</y>
+      <width>80</width>
+      <height>23</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Disco L</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="toggleAllButton">
+    <property name="geometry">
+     <rect>
+      <x>660</x>
+      <y>100</y>
+      <width>80</width>
+      <height>23</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Toggle all</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="discoRightButton">
+    <property name="geometry">
+     <rect>
+      <x>710</x>
+      <y>130</y>
+      <width>80</width>
+      <height>23</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Disco R</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="bpmButton">
+    <property name="geometry">
+     <rect>
+      <x>630</x>
+      <y>190</y>
+      <width>151</width>
+      <height>23</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>BPM tap</string>
+    </property>
+   </widget>
+   <widget class="QSpinBox" name="spinBox">
+    <property name="geometry">
+     <rect>
+      <x>660</x>
+      <y>220</y>
+      <width>61</width>
+      <height>24</height>
+     </rect>
+    </property>
+    <property name="maximum">
+     <number>10000</number>
+    </property>
+   </widget>
+   <widget class="QComboBox" name="audioDeviceSelection">
+    <property name="geometry">
+     <rect>
+      <x>630</x>
+      <y>300</y>
+      <width>131</width>
+      <height>23</height>
+     </rect>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="openAudioDeviceButton">
+    <property name="geometry">
+     <rect>
+      <x>620</x>
+      <y>340</y>
+      <width>80</width>
+      <height>23</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Open</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="closeAudioDeviceButton">
+    <property name="geometry">
+     <rect>
+      <x>710</x>
+      <y>340</y>
+      <width>80</width>
+      <height>23</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Close</string>
+    </property>
+   </widget>
+   <widget class="QWidget" name="layoutWidget">
+    <property name="geometry">
+     <rect>
+      <x>620</x>
+      <y>370</y>
+      <width>170</width>
+      <height>151</height>
+     </rect>
+    </property>
+    <layout class="QHBoxLayout" name="horizontalLayout_2">
+     <item>
+      <layout class="QVBoxLayout" name="verticalLayout">
+       <item>
+        <widget class="QRadioButton" name="radioButton">
+         <property name="text">
+          <string/>
+         </property>
+         <property name="checked">
+          <bool>false</bool>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QSlider" name="verticalSlider">
+         <property name="maximum">
+          <number>100</number>
+         </property>
+         <property name="orientation">
+          <enum>Qt::Vertical</enum>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <layout class="QVBoxLayout" name="verticalLayout_2">
+       <item>
+        <widget class="QRadioButton" name="radioButton_2">
+         <property name="text">
+          <string/>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QSlider" name="verticalSlider_2">
+         <property name="maximum">
+          <number>100</number>
+         </property>
+         <property name="orientation">
+          <enum>Qt::Vertical</enum>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <layout class="QVBoxLayout" name="verticalLayout_4">
+       <item>
+        <widget class="QRadioButton" name="radioButton_3">
+         <property name="text">
+          <string/>
+         </property>
+         <property name="checked">
+          <bool>true</bool>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QSlider" name="verticalSlider_3">
+         <property name="maximum">
+          <number>100</number>
+         </property>
+         <property name="value">
+          <number>0</number>
+         </property>
+         <property name="orientation">
+          <enum>Qt::Vertical</enum>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <widget class="QSlider" name="verticalSlider_4">
+       <property name="maximum">
+        <number>100</number>
+       </property>
+       <property name="value">
+        <number>50</number>
+       </property>
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </widget>
+   <widget class="QComboBox" name="comboBox">
+    <property name="geometry">
+     <rect>
+      <x>620</x>
+      <y>520</y>
+      <width>79</width>
+      <height>23</height>
+     </rect>
+    </property>
+    <item>
+     <property name="text">
+      <string>Disco L</string>
+     </property>
+    </item>
+    <item>
+     <property name="text">
+      <string>Disco R</string>
+     </property>
+    </item>
+    <item>
+     <property name="text">
+      <string>Toggle All</string>
+     </property>
+    </item>
+   </widget>
+  </widget>
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>800</width>
+     <height>20</height>
+    </rect>
+   </property>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/r3ctl.pro b/r3ctl.pro
index cb9415b..d77deea 100644
--- a/r3ctl.pro
+++ b/r3ctl.pro
@@ -1,12 +1,20 @@
-QT = core network websockets
+QT = core gui widgets network websockets multimedia
 
-CONFIG += c++14
+CONFIG += c++latest
 
 DEFINES += QT_DEPRECATED_WARNINGS QT_DISABLE_DEPRECATED_BEFORE=0x060000
 
 SOURCES += \
+        bpmdetector.cpp \
         main.cpp \
+        mainwindow.cpp \
         r3client.cpp
 
 HEADERS += \
+    audioformat.h \
+    bpmdetector.h \
+    mainwindow.h \
     r3client.h
+
+FORMS += \
+    mainwindow.ui