linux-kernel - Re: [Bisected] ALSA: snd-usb: New streaming logic causes distortions on Burr-Brown DAC

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Message-ID: <s5h4nql55jt.wl%tiwai@suse.de>
Date:	Sat, 09 Jun 2012 09:05:10 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Markus Trippelsdorf <markus@...ppelsdorf.de>
Cc:	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	zonque@...il.com
Subject: Re: [Bisected] ALSA: snd-usb: New streaming logic causes distortions on Burr-Brown DAC

At Fri, 8 Jun 2012 20:11:54 +0200,
Markus Trippelsdorf wrote:
> 
> On 2012.06.08 at 17:50 +0000, Jamie Heilman wrote:
> > Markus Trippelsdorf wrote:
> > > I hear distortions on my Burr-Brown USB DAC whenever the (software)
> > > volume is set to some value lower than 100% in mpd. The lower the volume
> > > the bigger are the resulting distortions.
> > 
> > see patch: http://marc.info/?l=linux-kernel&m=133905533312625&w=2
> > 
> > You're probably getting distortion because mpd decided it would use
> > a stream format that's only 8bit.
> 
> Yes. The patch fixes the issue. Many thanks.

The patch is already in sound git tree, but missed in rc2.
It should be in rc3.


thanks,

Takashi
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