Implemented persisting of channel/note for each pad

drummachinesettings.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <QSettings>
+
+class DrumMachineSettings : public QSettings
+{
+public:
+    using QSettings::QSettings;
+
+    quint8 padChannel(quint8 pad) const;
+    void setPadChannel(quint8 pad, quint8 channel);
+
+    quint8 padNote(quint8 pad) const;
+    void setPadNote(quint8 pad, quint8 note);
+};