[alsa-devel] snd-usb-audio syncronisation problem

[Clemens Ladisch]

Adrian Stancu wrote:
> Yes!!! the feedback works correctly this way => perfect playback!
>
> what I had to do was:
>                 [...]
>                 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
>                 f /= 8;
>                 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
>                         spin_lock_irqsave(&subs->lock, flags);
>                         subs->freqm = f;
>                 [...]
>
> otherwise, the 'if' condition would still not be satisfied.

Oops.  Of course.

> Now, is there a way to incorporate this change into the driver without
> affecting functionality for other usb audio devices?

I'll write a quirk.


Regards,
Clemens