Just to “prove” the point. This is a recording, where you can hear hard left/right swapping.
I booted up with no engines. Then loading the snapshot described here (but it also happens with just bare soundfonts):
And there you go:
But as I said. When you know this and play notes for 2 minutes, it settles.
So on the digital side everything is ok. Just when that card is converting digital to analog it is doing those strange things, and only shortly after boot up.
Any suggestions as to what logs I should capture? Maybe this can be eliminated alltogether…
Hardware is dumb, and very terse, and it does weird things when it goes wrong.
Unless you’d like to get out the magnifying glass and micro soldering irons ( and there are people out there who do…) you need to investigate how much it affects you.
I bet you feel better now you have proved it to yourself, and in that sense you possess a personalised instrument!
Course if it was returned I’m pretty sure it would be dealt with effectively, and meantime those committed and honoured zynthians that occasionally gather on some dark blasted European hill, will burn the card to the accompaniment of your audio posts on some as yet un-arranged date !!
Honestly, I’ll look at it with a magnifying glass, to see if there are any fissures in the soldering or “cold” spots. But as there is no special thermal strain in that area (especially none that could heat up so much in under 3 minutes) I really doubt it - but then again who knows.
Concerning the usb audio device, I’m not sure that the one I have lying around is class compatible. But - thanks for all your help, it’s so appreciated! I feel now this is a strong community, trying to push things forward!
If there is a poor solder joint then the signals may be on the edge of working. The components to which these pins connect may subsequently warm up and their electrical behaviour may change. A signal that was oscillating may stop or vice versa. It is not the solder joint that is affected by heat, it is the sensitivity of the component, e.g. CPU, CODEC, etc.