"Velocity" is the technical term, and it's the term that's used everywhere.
"Gain" was probably only used because "gain" is used on wave tracks; since
note tracks aren't wave tracks (and shouldn't be treated as them) the
corresponding variables should be named velocity.
The compilation was broken in 67cec5a but fixed in ed8c7fd. However, the warnings weren't fixed. The same general sign-related changes from 67cec5a were applied, fixing several warnings.
This also changes the arguments for NoteTrack's label click handler, to match the ones found in TrackPanel. That's needed to handle some other const-related changes.
Additionally, EXPERIMENTAL_MIDI_PLAYBACK was changed to EXPERIMENTAL_MIDI_OUT in the documentation, as that is the correct name.
... for functions in final classes.
override is like const -- it's not necessary, but it helps the compiler to
catch mistakes.
There may be some overriding functions not explicitly declared virtual and I did
not identify such cases, in which I might also add override.
... Should have no effect on generated code, except perhaps some slight faster
virtual function calls. Mostly useful as documentation of design intent.
Tried to mark every one of our classes that inherits from another, or is a
base for others, or has abstract virtual functions, and a few others besides.
Create WaveTrackCache as a utility class but don't use it anywhere yet.
The possible minor performance problem with effects is fixed by changes
in WaveTrack::GetBestBlockSize().
