public void MajorScaleStepTest()
{
Assert.AreEqual(MidiPitch.E0, ScaleLibrary.Step(Pitch.C, ScaleType.Major, MidiPitch.A0, -3));
Assert.AreEqual(MidiPitch.GNeg1, ScaleLibrary.Step(Pitch.C, ScaleType.Major, MidiPitch.C0, -3));
Assert.AreEqual(MidiPitch.D1, ScaleLibrary.Step(Pitch.C, ScaleType.Major, MidiPitch.A0, 3));
Assert.AreEqual(MidiPitch.A1, ScaleLibrary.Step(Pitch.C, ScaleType.Major, MidiPitch.A0, 7));
Assert.AreEqual(MidiPitch.D1, ScaleLibrary.Step(Pitch.C, ScaleType.Major, MidiPitch.B0, 2));
}
public void MinorScaleStepTest()
{
Assert.AreEqual(MidiPitch.GSharpNeg1, ScaleLibrary.Step(Pitch.C, ScaleType.Minor, MidiPitch.D0, -3));
Assert.AreEqual(MidiPitch.D4, ScaleLibrary.Step(Pitch.C, ScaleType.Minor, MidiPitch.G4, -3));
Assert.AreEqual(MidiPitch.F2, ScaleLibrary.Step(Pitch.C, ScaleType.Minor, MidiPitch.DSharp2, 1));
Assert.AreEqual(MidiPitch.D1, ScaleLibrary.Step(Pitch.E, ScaleType.Minor, MidiPitch.G1, -3));
Assert.AreEqual(MidiPitch.C3, ScaleLibrary.Step(Pitch.E, ScaleType.Minor, MidiPitch.B3, -6));
Assert.AreEqual(MidiPitch.FSharp5, ScaleLibrary.Step(Pitch.E, ScaleType.Minor, MidiPitch.D5, 2));
}
private static List <MidiPitch> GetPitches(Chord chord, ScaleType scaleType, int count, int octave)
{
var interval = 0;
var pitchesInChord = chord.Pitches(octave).Select(p => p.FromMidiPitch()).ToList();
var pitches = new List <MidiPitch>();
var stdDev = 0.5;
for (var i = 0; i < count; i++)
{
interval = Randomizer.Clamp(interval + Randomizer.Clamp(Randomizer.NextNormalized(0, stdDev), -4, 4), -7, 7);
var pitch = ScaleLibrary.Step(chord.BasePitch, scaleType, chord.BasePitch.ToMidiPitch(octave), interval);
pitches.Add(pitch);
stdDev = pitchesInChord.Contains(pitch.FromMidiPitch()) ? 0.75 : 2;
}
return(pitches);
}