mode method
Implementation
Scale mode(int modeNumber) {
assert(modeNumber >= 1, 'modeNumber must be greater or equal to 1');
assert(modeNumber <= modeCount,
'modeNumber must be less than or equal to $modeCount');
if (modeNumber == 1) return this;
var modeScaleDegree = identity.enabledBits[modeNumber - 1];
var newIdentity = identity.rotateRight(modeScaleDegree);
var newTonic = PitchClass(modeScaleDegree);
return Scale(tonic: newTonic, identity: newIdentity);
}