MIDI.setVolume seems to not do anything

[DoomTay]

If I have a sequence like this

MIDI.setVolume(0, 120, 0);
MIDI.noteOn(0,50,127,0);
MIDI.setVolume(0, 50, 1);
MIDI.noteOn(0,50,127,1);
MIDI.setVolume(0, 25, 2);
MIDI.noteOn(0,50,127,2);

I expect that each note would be quieter than the last. Instead, all three notes are of the same volume.

This might also be the responsible for the lack of a fadeout in MIDIs with type 7 controller events, like this one