melrōse musical expression player

package core // Pitched creates a new Note with a pitch by a (positive or negative) number of semi tones func (n Note) Pitched(howManySemitones int) Note { if howManySemitones == 0 { return n } if n.IsRest() || n.IsPedalUp() || n.IsPedalDown() || n.IsPedalUpDown() { return n } simple, err := MIDItoNote(1.0, n.MIDI()+howManySemitones, 1.0) if err != nil { panic(err) } p := MakeNote(simple.Name, simple.Octave, n.fraction, simple.Accidental, n.Dotted, n.Velocity) // handle tied notes for _, each := range n.tied { p = p.WithTiedNote(each.Pitched(howManySemitones)) } return p } func (n Note) Octaved(howmuch int) Note { if howmuch == 0 { return n } p := MakeNote(n.Name, n.Octave+howmuch, n.fraction, n.Accidental, n.Dotted, n.Velocity) // handle tied notes for _, each := range n.tied { p = p.WithTiedNote(each.Octaved(howmuch)) } return p } func (n Note) Stretched(f float32) Note { if f == 1.0 { return n } p := MakeNote(n.Name, n.Octave, n.fraction*f, n.Accidental, n.Dotted, n.Velocity) // handle tied notes for _, each := range n.tied { p = p.WithTiedNote(each.Stretched(f)) } return p }