hi everybody

explanation of my problem :

config : ableton + touchOSC + loopMidi (also tryed midiyoke) (+ PD of course)

I use midi clips, sending CC data (1 cc per clip, only 1 channel used for midi output, to avoid wrong data) so I can use the CC value to make play position cursors on touchOSC.

in PD I set something like that :

[ctlin cc# ch#]
| |
| [Number) ***for monitor purpose, easier to read than [print]
|
[send /fader $1(
|
[sendOSC]

My play position faders are sometimes working perfectly and sometimes they are glitchy, jittery.

at first i thought it was caused by the big number of OSC messages sent by puredata (I planned to do a trick that would filter values after [ctlin] so that it doesn't route redundant values and then only sends different OSC messages. but i got lazy and investigated elsewhere first)

I set a number object after [ctlin] and found that the values are delayed. sometimes cleanly delayed : everything coming late, and sometimes warped : everything ok, but some intermitent lower values. and sometimes for no reasons either it works perfectly. the delays are several seconds long.

in ableton i can see the cursor moving correctly all along the midi clip. if i turn off midi out from ableton during a delay, I still have midi activity for a few seconds in PD

other data are sent & received on time (OSC, midi out)

I only use 1 midi in and out in PD and ableton, via 2 loopMidi virtual cables. audio is off, no delay (1ms)

what could cause that ? it's either between ableton and PD or inside PD

thanks in advance

did you try a midimonitor like midiox.
I had a similar problem once and I found a sporadic infinite midi loop this way.

nope (pretty sure), I double checked everything, even optimized it a bit.

the midi signal is delayed. not all the time. sometimes it works perfectly, and sometimes not.

I tryed to monitor it via midiox but that's way too much data at once (huge amount of CCs coming from ableton).

after some further monitoring with midiox while it was severely not working (almost all signal not reveived but still some rare ones reaching destination) my puredata layout was innocented since midiox also received almost nothing.

the virtual cable were innocented too since it happens whatever the virtual midi cable i use. (btw loopmidi counts midi messages, and when it's bugging no midi message is counted)

the problem obviously comes from ableton live but I can't seem to identify it (and my live setup doesn't have any complex mid trick, it's just supposed to send an awful lot of midi CCs).

works perfectly ok on mac

(this is some old thread, but I had to update it)