From mboxrd@z Thu Jan 1 00:00:00 1970 From: dE Subject: What are subdevices? Date: Sun, 26 Oct 2014 13:44:13 +0530 Message-ID: <544CAD55.8070605@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pd0-f180.google.com (mail-pd0-f180.google.com [209.85.192.180]) by alsa0.perex.cz (Postfix) with ESMTP id C1D4226068A for ; Sun, 26 Oct 2014 09:14:39 +0100 (CET) Received: by mail-pd0-f180.google.com with SMTP id ft15so1876634pdb.11 for ; Sun, 26 Oct 2014 01:14:38 -0700 (PDT) Received: from [192.168.1.2] ([117.208.65.156]) by mx.google.com with ESMTPSA id g2sm7835758pdk.46.2014.10.26.01.14.35 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 26 Oct 2014 01:14:37 -0700 (PDT) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Hi! I tried this question in the alsa-users mailing list but it doesn't appear to be much active. So I ask here. I'm facing problems with my system, so decided to learn ALSA to see what's the problem. My first question -- what's a device and a sub device? A device seems like the output streams the sound card supports. Like HDMI, DP, analog etc... So what's a subdevice? Is this related to multichannel? Does it designate physical ports on the card? Thanks.