Jay and list,

On Thu, May 4, 2017 at 8:24 AM, Jay Foster <j...@systech.com> wrote:

> I have encountered a strange problem.  About 6 months ago, I added a USB
> sound adapter and alsa to an ARM based linux system.  I used aplay to
> play wav files successfully.
> Now, the playback has a crackling noise in it.  I can not find anything
> that has changed.  A few units still play with no noise, but I cannot
> determine any difference between them and the ones with the noise.
>
> One odd thing is if I run an application to make the CPU busy while
> playing the audio wav file, the noise seems to go away.  Any ideas on
> where to look for the root cause?
>
> Jay
>
>
I have had a similar experience using an AudioQuest DragonFly and a CuBox
i4.  In my case, errors were reported in syslog.  Do you show any errors
there?

Do you have any other USB sound cards to try out?


-- 
Chris Hermansen · clhermansen "at" gmail "dot" com

C'est ma façon de parler.
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