From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eliot Blennerhassett Subject: Re: multiple devices or one device w/ multiple subdevices? Date: Tue, 25 Aug 2009 15:06:00 +1200 Message-ID: <4A935518.4030608@audioscience.com> References: <6160a5130908241026g574282cuc878346df2ff31ef@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from lo.gmane.org (lo.gmane.org [80.91.229.12]) by alsa0.perex.cz (Postfix) with ESMTP id 5F62A2441B for ; Tue, 25 Aug 2009 05:06:27 +0200 (CEST) Received: from list by lo.gmane.org with local (Exim 4.50) id 1MfmMc-0007bQ-Vb for alsa-devel@alsa-project.org; Tue, 25 Aug 2009 05:06:26 +0200 Received: from 121-72-250-62.cable.telstraclear.net ([121.72.250.62]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 25 Aug 2009 05:06:26 +0200 Received: from eblennerhassett by 121-72-250-62.cable.telstraclear.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 25 Aug 2009 05:06:26 +0200 In-Reply-To: <6160a5130908241026g574282cuc878346df2ff31ef@mail.gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org Cc: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org pl bossart wrote: > Hi, > I have a piece of custom hardware that provides 7 independent PCM > outputs. > > My conclusion is that multiple devices would seem like a much better > option. But I wanted to check with the community that I am on the > right track. Thanks for your feedback! It used to be that there was a limit of 4 devices per card. But no (or large) limit on subdevices. If this still applies you will need to use subdevices, and for simplicity you would create just one device with 7 subdevs. -- Eliot