From mboxrd@z Thu Jan 1 00:00:00 1970 From: Takashi Iwai Subject: Re: playing 4 channels Date: Thu, 10 Oct 2002 17:14:52 +0200 Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: References: <200210101620.31335.flash@x4u.de> Mime-Version: 1.0 (generated by SEMI 1.14.4 - "Hosorogi") Content-Type: text/plain; charset=US-ASCII Return-path: In-Reply-To: <200210101620.31335.flash@x4u.de> Errors-To: alsa-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: flash@x4u.de Cc: alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org At Thu, 10 Oct 2002 16:20:31 +0200, Helmut Obertanner wrote: > > How can i tell my soundcard to play 1 stereochannel on Frontspeakers > and another stereochannel on rearspeakers ?? what sound card? i cannot tell you otherwise ;) > I can set my soundcard to 4 channelmode -> o.k. > I write samples in the following order to the soundbuffer: > > LF,RF,LR,RR > > but i get L-FRONT and R-FRONT on rear output too, and LR and RR are lost in > space. > how could i solve this ? this depends on the card, but in general, you can choose the route via the pcm name. for example, on sb live, you can play two stereo-wav files separately to front and rear speakers like: % aplay -Dfront foo.wav % aplay -Drear bar.wav but the chip can mix up the different streams, so the rear signals may be contaminated from front on a certain mixer set up. Takashi ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf