Re: [PATCH] ALSA: usb-audio: disable implicit feedback sync for Behringer UFX1204 and UFX1604

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On Thu, 30 Sep 2021 21:40:14 +0200,
Geraldo Nascimento wrote:
> 
> Hi Takashi,
> 
> Hopefully you will be able to apply this cleanly to branch master of your
> sound.git.
> 
> Thanks!
> Geraldo Nascimento
> 
> ---
> 
> Behringer UFX1204 and UFX1604 have Synchronous endpoints to which
> current ALSA code applies implicit feedback sync as if they were
> Asynchronous endpoints. This breaks UAC compliance and is unneeded.
> 
> The commit 5e35dc0338d85ccebacf3f77eca1e5dea73155e8 and subsequent
> 1a15718b41df026cffd0e42cfdc38a1384ce19f9 were meant to clear up noise.
> 
> Unfortunately, noise persisted for those using higher sample rates and
> this was only solved by commit d2e8f641257d0d3af6e45d6ac2d6f9d56b8ea964
> 
> Since there are no more reports of noise, let's get rid of the
> implicit-fb quirks breaking UAC compliance.
> 
> Signed-off-by: Geraldo Nascimento <geraldogabriel@xxxxxxxxx>

Thanks, applied now.


Takashi



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