[pulseaudio-discuss] Missing channels on Terratec 6Fire USB

Robert M. Albrecht linux at romal.de
Mon Mar 26 07:11:14 PDT 2012


I'm trying to install the Terratec 6Fire USB audio device. It's an 
external audio device with several analog in & output channels.

The alsa-driver is running and I can play analog stereo music or movies 
on pulseaudio based players.

I can output digital sound (ac3 or dts) on spdif via optical with vlc 
and mplayer.

But I can't output analog multichannel sound from flac files or movies. 
Although alsamixer can access all 6 analog output channels, pulseaudio 
does not see then.

I'm running Pulseaudio on Fedora 16.

Currently I'm slighty lost, as I'm not sure if this is a driver, an alsa 
or an pulseaudio problem and how to troubleshoot this. Any help would be 


[root at localhost alsa]# aplay -L
     HDA Intel, STAC92xx Analog
     Default Audio Device
     HDA Intel, STAC92xx Analog
     Front speakers
     HDA Intel, STAC92xx Analog
     4.0 Surround output to Front and Rear speakers
     HDA Intel, STAC92xx Analog
     4.1 Surround output to Front, Rear and Subwoofer speakers
     HDA Intel, STAC92xx Analog
     5.0 Surround output to Front, Center and Rear speakers
     HDA Intel, STAC92xx Analog
     5.1 Surround output to Front, Center, Rear and Subwoofer speakers
     HDA Intel, STAC92xx Analog
     7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
     TerraTec DMX6FireUSB, DMX 6Fire USB Analog
     Default Audio Device
[root at localhost alsa]#

[root at localhost pulse]# aplay -l
**** Liste der Hardware-Geräte (PLAYBACK) ****
Karte 0: Intel [HDA Intel], Gerät 0: STAC92xx Analog [STAC92xx Analog]
   Sub-Geräte: 1/1
   Sub-Gerät #0: subdevice #0
Karte 1: DMX6FireUSB [TerraTec DMX6FireUSB], Gerät 0: 6fire Analog [DMX 
6Fire USB Analog]
   Sub-Geräte: 1/1
   Sub-Gerät #0: subdevice #0
Karte 1: DMX6FireUSB [TerraTec DMX6FireUSB], Gerät 1: 6fire Digital Out 
[DMX 6Fire USB Digital Playback]
   Sub-Geräte: 1/1
   Sub-Gerät #0: subdevice #0
[root at localhost pulse]#

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