private static int GetFractionOffset(PifagorTemperamentScale scale)
{
switch (scale)
{
case PifagorTemperamentScale.Lidiy:
return(0);
case PifagorTemperamentScale.Frigiy:
return(2);
case PifagorTemperamentScale.Doriy:
return(4);
case PifagorTemperamentScale.HyperDoriy:
return(-1);
case PifagorTemperamentScale.HypoLidiy:
return(5);
break;
case PifagorTemperamentScale.HypoFrigiy:
//ktfOffset = -5;
return(7);
case PifagorTemperamentScale.HypoDoriy:
//ktfOffset = -3;
return(9);
default:
throw new NotImplementedException();
}
}
private static Interval[] GetScaleInterval(PifagorTemperamentScale scale)
{
switch (scale)
{
case PifagorTemperamentScale.Lidiy:
return(LidiyIntervals);
case PifagorTemperamentScale.Frigiy:
return(FrigiyIntervals);
case PifagorTemperamentScale.Doriy:
return(DoriyIntervals);
case PifagorTemperamentScale.HyperDoriy:
return(HyperDoriyIntervals);
case PifagorTemperamentScale.HypoLidiy:
return(HypoLidiyIntervals);
case PifagorTemperamentScale.HypoFrigiy:
return(HypoFrigiyIntervals);
case PifagorTemperamentScale.HypoDoriy:
return(HypoDoriyIntervals);
default:
throw new NotImplementedException();
}
}
private static Fraction[] GetFractionByTones(PifagorTemperamentScale scale)
{
var tonica = GetScaleInterval(scale);
List <Fraction> r = new List <Fraction>(tonica.Length + 1);
r.Add(1);
for (int i = 0; i < tonica.Length; i++)
{
var f = r.Last();
switch (tonica[i])
{
case Interval.Tone:
f *= new Fraction(9, 8);
break;
case Interval.HalfTone:
f *= new Fraction(256, 243);
break;
}
r.Add(f.Reduce());
}
return(r.ToArray());
}
public PifagorTemperament(double baseFrequency = 1, PifagorTemperamentScale scale = PifagorTemperamentScale.Lidiy) :
base(
"Pifagor " + scale.ToString(),
baseFrequency,
GetFractionByTones(scale),
GetFractionOffset(scale),
GetKbToFraction(GetScaleInterval(scale)))
{
}
