[alsa-devel] Distorted jackd output on Macbooks

Takashi Iwai tiwai at suse.de
Tue May 8 13:01:32 CEST 2012

At Fri, 27 Apr 2012 21:13:48 +0200,
Adrian Knoth wrote:
> Hi!
> JFTR, we've seen users that report distorted sound on their macbooks
> when using jackd.
> The workaround is to force 16-bit output:
>     http://jackaudio.org/macbook_distortion
> Chip in question was the Cirrus Logic CS4206. We don't know yet which of
> the formats (32/24) is broken, maybe only one, maybe both.

Distrotion means noisy outputs or complete noise?
And does this happen only with JACK?  That is, if you run "aplay -Dhw"
with 32bit PCM, does it play normally?



> I happen to have a spare MacBookPro around, but I won't have time to
> look into that myself anytime soon.
> If somebody else has such a device and wants to give it a whirl, feel
> free to go ahead. ;)
> Cheers
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