From owner-freebsd-multimedia@FreeBSD.ORG  Sat Jan 21 14:53:57 2012
Return-Path: <owner-freebsd-multimedia@FreeBSD.ORG>
Delivered-To: freebsd-multimedia@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id C21641065670
	for <freebsd-multimedia@freebsd.org>;
	Sat, 21 Jan 2012 14:53:57 +0000 (UTC) (envelope-from br@rtclab.com)
Received: from mx.bsdpad.com (mx.bsdpad.com [46.4.68.80])
	by mx1.freebsd.org (Postfix) with ESMTP id 7E6CC8FC12
	for <freebsd-multimedia@freebsd.org>;
	Sat, 21 Jan 2012 14:53:57 +0000 (UTC)
Received: from mx.bsdpad.com ([46.4.68.80] helo=rtclab.com)
	by mx.bsdpad.com with esmtps (TLSv1:AES256-SHA:256)
	(Exim 4.76 (FreeBSD)) (envelope-from <br@rtclab.com>)
	id 1Robfv-0001x4-L1
	for freebsd-multimedia@freebsd.org; Sat, 21 Jan 2012 18:12:11 +0400
Received: (from br@localhost)
	by rtclab.com (8.14.5/8.14.5/Submit) id q0LECBO9007505
	for freebsd-multimedia@freebsd.org; Sat, 21 Jan 2012 14:12:11 GMT
	(envelope-from br)
Date: Sat, 21 Jan 2012 18:12:11 +0400
From: Ruslan Bukin <br@bsdpad.com>
To: freebsd-multimedia@freebsd.org
Message-ID: <20120121141211.GA7462@jail.io>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
User-Agent: Mutt/1.5.21 (2010-09-15)
Subject: multi-mono-channel sound card
X-BeenThere: freebsd-multimedia@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Multimedia discussions <freebsd-multimedia.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-multimedia>, 
	<mailto:freebsd-multimedia-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-multimedia>
List-Post: <mailto:freebsd-multimedia@freebsd.org>
List-Help: <mailto:freebsd-multimedia-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-multimedia>, 
	<mailto:freebsd-multimedia-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 21 Jan 2012 14:53:57 -0000

Hi,

My multichannel sound card (RME HDSPe AIO) is support 
SND_FORMAT(AFMT_S32_LE, 1, 0) only.

I call pcm_addchan(..), which triggers chan_init(..,*snd_dbuf,..)
Addr of snd_dbuf I write to card in slot N.
In result I have /dev/dsp0.pN devices (one device per each mono channel)

Works perfectly, sounds great, but in mono mode.

I'm interested, what is the right way to implement 
stereo pair of channels per one device file like in OSS?

-Ruslan