public Pitch getPitchByIntervalDown(int itv) {
Pitch n = new Pitch(pit);
n.pit -= itv;
return n;
}
public Pitch getPitchByIntervalDown(String itv) throws ParserException {
Pitch n = new Pitch(pit);
if (!interval.containsKey(itv)) throw new ParserException("Invalid interval " + itv);
n.pit -= interval.get(itv);
return n;
}
public Pitch getPitchByIntervalUp(int itv) {
Pitch n = new Pitch(pit);
n.pit += itv;
return n;
}