From: "Gabriel M. Beddingfield" <gabrbedd@gmail.com>
To: alsa-devel@alsa-project.org
Subject: Re: Delay calculations for USB audio?
Date: Fri, 28 Sep 2012 06:23:14 -0500 [thread overview]
Message-ID: <506588A2.4070602@gmail.com> (raw)
In-Reply-To: <5065834E.4010707@canonical.com>
On 09/28/2012 06:00 AM, David Henningsson wrote:
> (Oh, and btw, if you have an idea of the crackling/distorted USB audio,
> let me know. I'm using a standard Logitech USB Headset, using
> speaker-test -c 2 -D plughw:Headset -t sine -r 48000
> I can make the problem go away using any of these options:
> * Booting a 3.2 kernel - I've tried 3.5, 3.6-rc7 and 3.2
> * Choosing the 44100 sample rate instead of the default of 48000
> * Selecting the outer USB port instead of the inner one. Yes, there
> are two USB ports next to each other, and this only happens on one of
> them. (!))
The last statement sounds like you're sharing a hub with another device
that has reserved bandwidth. For example, a USB webcam will often do
this. Audio will work for a while and then get pre-empted.
Use 'lsusb -t' to view your USB layout.
-gabriel
next prev parent reply other threads:[~2012-09-28 11:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-28 11:00 Delay calculations for USB audio? David Henningsson
2012-09-28 11:23 ` Gabriel M. Beddingfield [this message]
2012-09-28 11:56 ` David Henningsson
2012-09-28 12:30 ` Clemens Ladisch
2012-09-28 17:29 ` David Henningsson
2012-09-28 18:01 ` Gabriel Beddingfield
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