public static Phrase TransposeToScale(Phrase phrase, string fromScale, string toScale)
{
var fromRoot = GetScaleRootNote(fromScale);
var toRoot = GetScaleRootNote(toScale);
var fromType = GetScaleType(fromScale);
var toType = GetScaleType(toScale);
Phrase transposedPhrase;
if (fromType == toType)
{
transposedPhrase = phrase.Clone();
}
else
{
var intermediateScale = NoteHelper.NumberToNoteOnly(fromRoot) + " " + toType;
transposedPhrase = MashNotesToScale(phrase, intermediateScale);
}
var distance = NoteHelper.GetDistanceBetweenNotes(fromRoot, toRoot);
if (distance == 0)
{
return(transposedPhrase);
}
var direction = distance < 0 ? Direction.Down : Direction.Up;
transposedPhrase = NoteHelper.ShiftNotes(transposedPhrase, Math.Abs(distance), Interval.Step, direction);
transposedPhrase = MashNotesToScale(transposedPhrase, toScale);
return(transposedPhrase);
}
public static List <Scale> GetScales()
{
if (_scales != null)
{
return(_scales);
}
_scales = new List <Scale>();
var chromaticNotes = NoteHelper.GetNoteNames().Select(NoteHelper.NoteToNumber).ToList();
chromaticNotes.AddRange(NoteHelper.GetNoteNames().Select(NoteHelper.NoteToNumber).ToList());
var scaleDefinitions = new Dictionary <string, int[]>
{
{ "Natural Minor", new[] { 0, 2, 1, 2, 2, 1, 2 } },
{ "Harmonic Minor", new[] { 0, 2, 1, 2, 2, 1, 3 } },
{ "Major", new[] { 0, 2, 2, 1, 2, 2, 2 } }
};
foreach (var scaleDefinition in scaleDefinitions)
{
var increments = scaleDefinition.Value.ToList();
for (var i = 0; i < 12; i++)
{
var noteIndex = i;
var notes = new List <int>();
foreach (var increment in increments)
{
noteIndex += increment;
notes.Add(chromaticNotes[noteIndex]);
}
var scale = new Scale()
{
Name = NoteHelper.NumberToNoteOnly(chromaticNotes[i]) + " " + scaleDefinition.Key,
Notes = notes
};
_scales.Add(scale);
}
}
return(_scales);
}
