Alsa-Devel Archive on lore.kernel.org
 help / color / mirror / Atom feed
From: Xuebing Wang <xbing6@gmail.com>
To: alsa-devel@alsa-project.org,
	richard Jiang <Richard.Jiang@infocus.com>,
	niranjan Patil <Niranjan.Patil@infocus.com>
Subject: [USB UAC2] How to route pcm stream for UAC2 virtual sound card for lowest latency?
Date: Tue, 10 Mar 2015 16:27:33 +0800	[thread overview]
Message-ID: <54FEAAF5.1090306@gmail.com> (raw)

Hi Community,

I am developing a commercial product based on Freescale iMX6SL + UAC2.

I can get UAC2 working for below command. 'hw:1,0' is the virtual sound 
card. 'hw:0,0' is the physical sound card.
export RATE=44100; arecord -D hw:1,0 -c 2 -r $RATE -f S16_LE | aplay -c 
2 -r $RATE -f S16_LE &

Any suggestions on what is the best way to get PCM stream from UAC2 
virtual sound card and feed to the physical sound card, for the lowest 
latency purpose?

Thanks.

-- 
Xuebing

             reply	other threads:[~2015-03-10  8:27 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-10  8:27 Xuebing Wang [this message]
2015-03-10  8:30 ` [USB UAC2] How to route pcm stream for UAC2 virtual sound card for lowest latency? Clemens Ladisch

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=54FEAAF5.1090306@gmail.com \
    --to=xbing6@gmail.com \
    --cc=Niranjan.Patil@infocus.com \
    --cc=Richard.Jiang@infocus.com \
    --cc=alsa-devel@alsa-project.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox