Add new comment

Rui,

your support is great and very welcome!

snd-hrtimer is loaded and I use the high resolution. 10.000Hz when I remember right. (I'm at work...)

The XRun(s) occur immediatly at the beginning of the loop and are reported by jackd. Then the timing is completely gone (midi output is delayed and notes are 'bouncing' around.), audio is disturbed from that point (and maybe stops...)

Yes, it works in Rosegarden.

Yesterday night I investigated one more thing:
I have two MIDI devices, a synthy and an e-piano. When I only enable the e-piano, everything works smooth, when I enable the synthy, the problem occurs (I have disconnected MIDI out from the synth to avoid possible MIDI-through loops).
The difference is: I have no instrument definition for the piano (yes yes, one of these old devices which only have one sound;-).
This means: no program change at the beginning of the sequence. (There might be the difference to rosegarden, I don't think they add the programm change to the sequence, as it is done in qtractor - but I'm not sure)

It could be 'bad vibes' between my 'vintage MIDI controller' and theese progranm changes... .
BTW - when I started testing with qtractor I tried to get rid of the programm changes and sometimes it seemed that they are added mor than once at the beginning of sequence - could this be?

I'm sorry, I have not tested all this with my alsa audio device - I will try it tonight. Unfortunatly I don't have another MIDI controller.

Thanks again Rui!

Holger