From mboxrd@z Thu Jan 1 00:00:00 1970 From: Florian Bomers Subject: devices/subdevices, hw:/plughw: Date: Fri, 20 Sep 2002 09:24:21 -0700 Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: <3D8B4BB5.82ACFB11@sun.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Errors-To: alsa-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org (I initially posted this to alsa-user without answers. Hope to get more lucky here...) Hi, sorry for those general questions, but I wasn't able to find anything on the archives or in the ALSA documentation. What is the meaning of devices vs. subdevices ? What is an example where a device would have several subdevices, as opposed to the card having several devices ? I want to display a list of available "ports" where the user can send the audio generated by the program. If a device has several subdevices, would I include them in the list, or just list the devices for each card ? My program successfully lists the cards with their devices and subdevices for hw: (i.e. snd_ctl_open("hw:0") ). However, this does not work for the plughw: way, although from what I understood, I want to use plughw: (as it is supposed to support automatic sample rate conversion). How do I iterate all available plughw: "cards", devices, and subdevices? Or can I assume that if hw:0,0 exists, that plughw:0,0 is the same card/device - and I just can't iterate available plughw:'s directly ? Thanks! Florian -- Florian Bomers Java Sound Java Software/Sun Microsystems, Inc. http://java.sun.com/products/java-media/sound/ ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf