Hello!
For MIDI only plugins, timeline could be unwrapped based on
instantaneous tempo.
My way of seeing this is:
1. sample-sync is dependent on current BPM (beat size in samples will vary)
2. MIDI clock follows BPM changes, and MIDI plugins act exactly in the
same way, as they would do with constant tempo.
For sample-based plugins, BPM - is nothing but automated parameter - and
it should be considered as such by "tempdelay" and others such plugins.
Say, MIDI plugin sends another event after 5 "midi units". Actual length
of "midi units" will vary depending on current BPM, as most of MIDI
plugins have "musical" sense and are bound to tempo anyway.
If MIDI plugin developer would desire to send event after a constant
delay, not depending on BPM, a simple implementation would allows to do
it like this (I describe in metalanguage):
NextMIDIEventPosition =
host.midiPositionFor(host.getPositionInSamples()+0.5sec*host.sampleRate());
I think, it's conceptually clean.
Thanks, George
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