> When I record (hit the red button in RG) and start playing my external
> MIDI keyboard/controller (coming into RG via my sound card),
> rosegarden, via its MIDI through facility, sends the events from my
> keypresses to my external synthesizer, which produces the expected
> notes in response to the keypresses. However, after playing for
> somewhere between 5 and 10 minutes a glitch occurs such that, often,
> when I play sustained chords[1], I hear the attack but the sound
> immediately ceases and then continues again a fraction (I'd say 1/4 to
> 1/2 a second) of a second later - sort of an echo effect. It sounds
> like (although I haven't verified this is what happens) a note on is
> sent to the synth for each key pressed, then a note off for each key
> immediately after that, then a note on again, until I release the keys,
> and a note off is sent - again for each key.
Could it be that since we are now making noteoffs in mapping, that they
somehow get mixed into the playthru?
ISTM no:
* Playthru doesn't go thru mapping, it goes no deeper than ControlBlock.
* If that was it it should show up immediately, on the first note you
played.
To my mind, it resembles what we were seeing with the Beethoven Moonlight
recording: sometimes input will outrace something we do in response.
IIRC, Ted diagnosed the Beethoven bug as update events to segments taking
too much time when segments get big. Seems like that could cause what you
are seeing, Jim.
If that's it, then it's a bit up in the air. We talked about somehow
queueing events instead of updating all the time, but that's definitely
not in 12.12 and I can't say whether or when that will happen.
Tom Breton (Tehom)
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