Tony: a tool for melody transcription

h1. Monophonic Note Layer

h3. Rationale

A new monophonic note layer (MNL) is necessary because Sonic Visualiser does not implement two aspects that are crucial to Tony

# interactive update from pitch track, i.e. user change in the note track leads to re-estimation of note pitch from pitch track

# editing capabilities, in particular

#* continuous pitch (i.e. not just integer MIDI pitches)

#* fluid note boundary editing

From experience, the user interactions that are required the most are (most important first)

# splitting of notes (two separately sung notes, usually of the same pitch, auto-recognised as one)

# merging of notes (one perceived note auto-recognised as two)

# adjust start and/or end time of notes (rarely in the same direction!)

# removal of erroneously detected pitches

# addition of undetected pitches

# correction of octave errors

The MNL should cater for these.

George and Matthias have been brainstorming, and these actions seem to be a sensible choice.

* clicking a note selects

* double-clicking a note splits the note

* double-clicking a note boundary merges the two adjoining notes

* moving boundary handle to lengthen note pushes adjacent note's boundary

* moving boundary to shorten the note creates space (rest) between the notes

* moving boundary to duration 0 removes note

To make this work nicely, maybe, rests need handles, too.