For plugin format clients only.
This return a slice of MIDI messages to be sent for this (whole unsplit) buffer.
Internally, you need to either use split-buffering from this file, or if the format does
its own buffer split it needs to call accumulateOutputMIDI itself.
For plugin format clients only. This return a slice of MIDI messages to be sent for this (whole unsplit) buffer. Internally, you need to either use split-buffering from this file, or if the format does its own buffer split it needs to call accumulateOutputMIDI itself.