From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Rigg Subject: Re: pcm_multi broken in alsa-lib - no duplex mode with jackd Date: Thu, 8 Mar 2007 19:02:31 +0000 Message-ID: <20070308190231.GA3066@localhost.localdomain> References: <45F044D2.1060903@mnet-online.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <45F044D2.1060903@mnet-online.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@lists.sourceforge.net Errors-To: alsa-devel-bounces@lists.sourceforge.net To: alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org On Thu, Mar 08, 2007 at 06:16:02PM +0100, Simon Lewis wrote: > Dear ALSA Developers > > When I attempted to combine several device drivers using the pcm_multi > function in .asound.conf I learned the hardway that pcm_multi doesn't > work in duplex mode with jackd. Apparently pcm_multi was broken in > alsa-lib 1.0.9rc1 and has never been fixed. > > Many JACK users have successfully used the following patch: > > http://www.sound-man.co.uk/linuxaudio/pcm_multi-patch > > I have since learned that many studio64 users have been bitten by this bug. > > Please, please, please add the above patch to version 1.014 of ALSA libs > before they are finally released as stable. vote ++1 There are actually quite a few of us using multi-card setups for high channel counts these days. The extra linking code added to pcm_multi.c in 1.0.9rc1 stopped this from working with jackd (which anybody using a Linux system as a serious audio workstation will be using). I haven't noticed any problem caused by removing it, and I've done many hours of multitrack recording since then. John ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV