public static float GetFrequency(IonianScale scale, bool sharp, float octave, int semitones = 0)
{
double freq = 27.5 * Math.Pow(2, octave);
int scaleTimes = semitones + (int)scale * 2;
switch (scale)
{
case IonianScale.C:
case IonianScale.D:
case IonianScale.E:
scaleTimes--;
break;
case IonianScale.F:
case IonianScale.G:
scaleTimes -= 2;
break;
}
if (sharp)
{
scaleTimes++;
}
freq *= Math.Pow(Math.Pow(2, 1.0 / 12.0), scaleTimes);
return((float)freq);
}
public void TestMajorScaleNoteIntervals()
{
var scale = new IonianScale(MusicNotes.A);
Assert.Equal(IntervalQuality.P1, scale.Notes[0].Interval.IntervalQuality);
Assert.Equal(IntervalQuality.M2, scale.Notes[1].Interval.IntervalQuality);
Assert.Equal(IntervalQuality.M3, scale.Notes[2].Interval.IntervalQuality);
Assert.Equal(IntervalQuality.P4, scale.Notes[3].Interval.IntervalQuality);
Assert.Equal(IntervalQuality.P5, scale.Notes[4].Interval.IntervalQuality);
Assert.Equal(IntervalQuality.M6, scale.Notes[5].Interval.IntervalQuality);
Assert.Equal(IntervalQuality.M7, scale.Notes[6].Interval.IntervalQuality);
}
private void AddPianoKeyView(int column, int span, IonianScale scale, bool sharp)
{
var view = new PianoKey()
{
Sharp = sharp,
Scale = scale,
AttackCommand = OnAttack,
ReleaseCommand = OnRelease,
};
Grid.SetColumn(view, column);
Grid.SetColumnSpan(view, span);
Grid.SetRowSpan(view, sharp ? 1 : 2);
grid.Children.Add(view);
}
public void TestBFlatMajor()
{
var scale = new IonianScale(MusicNotes.BFlat);
Assert.Equal(7, scale.Notes.Length);
Assert.Equal(MusicNotes.BFlat, scale.Notes[0].Note);
Assert.Equal(MusicNotes.C, scale.Notes[1].Note);
Assert.Equal(MusicNotes.D, scale.Notes[2].Note);
Assert.Equal(MusicNotes.EFlat, scale.Notes[3].Note);
Assert.Equal(MusicNotes.F, scale.Notes[4].Note);
Assert.Equal(MusicNotes.G, scale.Notes[5].Note);
Assert.Equal(MusicNotes.A, scale.Notes[6].Note);
}
public void TestASharpMajor()
{
var scale = new IonianScale(MusicNotes.ASharp);
Assert.Equal(7, scale.Notes.Length);
Assert.Equal(MusicNotes.ASharp, scale.Notes[0].Note);
Assert.Equal(MusicNotes.BSharp, scale.Notes[1].Note);
Assert.Equal(MusicNotes.CDoubleSharp, scale.Notes[2].Note);
Assert.Equal(MusicNotes.DSharp, scale.Notes[3].Note);
Assert.Equal(MusicNotes.ESharp, scale.Notes[4].Note);
Assert.Equal(MusicNotes.FDoubleSharp, scale.Notes[5].Note);
Assert.Equal(MusicNotes.GDoubleSharp, scale.Notes[6].Note);
}
public void TestAMajor()
{
var scale = new IonianScale(MusicNotes.A);
Assert.Equal(7, scale.Notes.Length);
Assert.Equal(MusicNotes.A, scale.Notes[0].Note);
Assert.Equal(MusicNotes.B, scale.Notes[1].Note);
Assert.Equal(MusicNotes.CSharp, scale.Notes[2].Note);
Assert.Equal(MusicNotes.D, scale.Notes[3].Note);
Assert.Equal(MusicNotes.E, scale.Notes[4].Note);
Assert.Equal(MusicNotes.FSharp, scale.Notes[5].Note);
Assert.Equal(MusicNotes.GSharp, scale.Notes[6].Note);
}
