private void automaticHarmonyButton_Click(object sender, EventArgs e)
{
// automatic harmony can only be added when beat was specified
// (otherwise there is no way to know the correct placement of chords)
if (bpm == 0)
{
MessageBox.Show("You can't add harmony automatically if there is no beat!");
return;
}
// user must specify which progression they want generated
if (chordProgSelector.SelectedIndex == -1 || (string)chordProgSelector.SelectedItem == "N/A")
{
MessageBox.Show("You must select a chord progression!");
return;
}
// reset harmony and check if it is possible to add a new one
try
{
recorder.AddHarmony(false);
}
catch (ApplicationException)
{
MessageBox.Show("You must select a scale first!");
return;
}
// get the correct chords from the given chord progression
List <ChordName> chords = new List <ChordName> {
};
switch ((string)chordProgSelector.SelectedItem)
{
case "ii - v - i":
{
chords.Add(ChordName.ii);
chords.Add(ChordName.v);
chords.Add(ChordName.ilow);
break;
}
case "i - iv - v":
{
chords.Add(ChordName.ilow);
chords.Add(ChordName.iv);
chords.Add(ChordName.v);
break;
}
case "i - v - vi - iv":
{
chords.Add(ChordName.ilow);
chords.Add(ChordName.v);
chords.Add(ChordName.vi);
chords.Add(ChordName.iv);
break;
}
case "i - vi - iv - v":
{
chords.Add(ChordName.ilow);
chords.Add(ChordName.vi);
chords.Add(ChordName.iv);
chords.Add(ChordName.v);
break;
}
case "i - v - i - iv":
{
chords.Add(ChordName.ilow);
chords.Add(ChordName.v);
chords.Add(ChordName.ihigh);
chords.Add(ChordName.iv);
break;
}
case "vi - v - iv - iii":
{
chords.Add(ChordName.vi);
chords.Add(ChordName.v);
chords.Add(ChordName.iv);
chords.Add(ChordName.iii);
break;
}
default:
{
chords.Add(ChordName.None);
break;
}
}
// a new chord is to be played on every chordFreqTrackBar.Value-th beat
int chordFrequency = bpm / chordFreqTrackBar.Value;
int oneChordDuration = Convert.ToInt32(1 / ((float)chordFrequency / 60) * 1000); // milliseconds
// add all chords with the correct duration to harmony
foreach (ChordName chord in chords)
{
recorder.AddChord(chord, oneChordDuration);
}
// generate recording with new harmony
recorder.RegenerateRecording();
// alert user that the process has finished
if (showMessageWhenHarmonyGenerated)
{
MessageBox.Show("Done! Hear the result by clicking Play.");
}
}