public TwelveToneSet(Random rand, int ntones, TwelveToneSet scale)
{
Debug.Assert(ntones <= scale.Count);
tone12 pos = 0;
// Find the first tone the scale
while (!scale[pos])
{
pos++;
}
// Randomly move it forward
int times = rand.Next(scale.Count);
pos = scale.Next(pos, times);
tones = 0;
tones &= (short)(1 << pos);
for (int i = 1; i < ntones; i++)
{
pos = scale.Next(pos, 2);
tones &= (short)(1 << pos);
}
Debug.Assert(ntones == this.Count);
}
