SPDIF only supports two channels. AC3 encoding (if the source material is PCM) or AC3 passthrough (if the source is AC3 encoded already) is required to send surround over the optical port. Lee On Thu, Dec 25, 2008 at 9:39 PM, Jason Gauthier <jgauthier@xxxxxxxxxx> wrote: > All, > > > > I have moved to 10.018a, and this issue still persists. I cannot get all > 6 channels working, and in fact the right and left seems to come out of the > rear. > > It's just completely inconsistent. > > > > Can anyone lend a hand, or some form of troubleshooting ideas? > > > > Thank you, > > > > Jason > > > > From: Jason Gauthier > Sent: Wednesday, October 29, 2008 9:58 PM > To: alsa-user@xxxxxxxxxxxxxxxxxxxxx > Subject: Surround Sound issues > > > > All, > > > > I'm using a Roland UA-1EX > (http://www.rolandus.com/products/productdetails.aspx?ObjectId=743) and > using the optical out. > > I'm having some very basic surround sound issues, I believe. > > > > Doing a simple speaker-test –c 6 I see the following output: > > > > speaker-test 1.0.18rc3 > > > > Playback device is default > > Stream parameters are 48000Hz, S16_LE, 6 channels > > Using 16 octaves of pink noise > > Rate set to 48000Hz (requested 48000Hz) > > Buffer size range from 2229 to 17832 > > Period size range from 1114 to 1115 > > Using max buffer size 17832 > > Periods = 4 > > was set period_size = 1114 > > was set buffer_size = 17832 > > 0 - Front Left > > 4 – Center > > 1 - Front Right > > 3 - Rear Right > > 2 - Rear Left > > 5 – LFE > > > > I am only having output on Front Left and Front Right. > > I am uncertain how to accomplish any further testing or determine what is > wrong. > > > > Can anyone lend a hand? > > > > Thanks, > > > > Jason > > ------------------------------------------------------------------------------ > > _______________________________________________ > Alsa-user mailing list > Alsa-user@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/alsa-user > > ------------------------------------------------------------------------------ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
