On 08.06.20 09:19, Takashi Iwai wrote:
On Sun, 07 Jun 2020 15:39:59 +0200,
Laurence Tratt wrote:
Hello,
I've found an interesting issue with an SSL2+ audio interface -- it plays and
records fine (and, for the money, the sound quality is excellent!), but
recording slowly but surely drifts over time. For example, if I record a
click track in Audacity (or Ardour), play it through the interface and record
it, and then line up the start of the recorded click track with the original,
the two tracks will be around 5ms out of alignment after 30s. Interestingly,
this problem does not happen with OpenBSD, where the two tracks line up
precisely.
The recent change in USB-audio might help for a case like yours.
Try my sound git tree (for-linus branch) or Linus' tree. The former
should be pullable onto 5.7 kernel cleanly.
Since I recently had clock drift issues with Audient devices, I'm
intrigued by this. @Takashi Can you quickly elaborate, what you think,
Laurance's issue might be and what has changed in that tree that might
help him fix it? Is there some general issue with the current (stable)
sound/usb implementation?
Thanks!
Thomas
