[PATCH 0/3] MR5221: dmime: MIDI seqtrack

[Yuxuan Shui (＠yshui)]

It feels a bit weird storing and playing MIDI control events directly in seqtrack. I originally thought they were stored as curve items, but curve items would generate `DMUS_CURVE_PMSG`, but these MIDI control events are played verbatim as `DMUS_MIDI_PMSG`.