Re: [LAU] Help with multichannel output

Le Fri, 6 Sep 2019 13:09:19 -0400, Scott <scott.a.mayo(a)gmail.com> a écrit : With a /etc/modprobe.d/alsa.conf file, you can reserve the ALSA card slots for all the devices, start the computer and plug the USB devices in the order you want them. Tested with 1 USB card here, I think this should work with several USB devices. Example: # Alsa kernel modules' configuration file. # ALSA portion alias char-major-116 snd # OSS/Free portion alias char-major-14 soundcore # Reserve first slot for snd-aloop options snd slots=snd-aloop ## ALSA portion alias snd-card-0 snd-aloop alias snd-card-1 snd-hda-intel alias snd-card-2 snd-hda-intel alias snd-card-3 snd-virmidi ## OSS/Free portion alias sound-slot-0 snd-aloop alias sound-slot-1 snd-hda-intel alias sound-slot-2 snd-hda-intel alias sound-slot-3 snd-virmidi #alias sound-slot-0 snd-card-0 #alias sound-slot-1 snd-card-1 #alias sound-slot-2 snd-card-2 #alias sound-slot-3 snd-card-3 ## options snd-aloop index=0 options snd-hda-intel index=1 model=alc271-dmic options snd-hda-intel index=2 options snd-virmidi index=3 # OSS/Free portion - card #1 alias sound-service-0-0 snd-mixer-oss alias sound-service-0-1 snd-seq-oss alias sound-service-0-3 snd-pcm-oss alias sound-service-0-8 snd-seq-oss alias sound-service-0-12 snd-pcm-oss ## OSS/Free portion - card #2 alias sound-service-1-0 snd-mixer-oss alias sound-service-1-3 snd-pcm-oss alias sound-service-1-12 snd-pcm-oss ## OSS/Free portion - card #3 alias sound-service-2-0 snd-mixer-oss alias sound-service-2-3 snd-pcm-oss alias sound-service-2-12 snd-pcm-oss ## OSS/Free portion - card #4 alias sound-service-3-0 snd-mixer-oss alias sound-service-3-3 snd-pcm-oss alias sound-service-3-12 snd-pcm-oss alias /dev/mixer snd-mixer-oss alias /dev/dsp snd-pcm-oss alias /dev/midi snd-seq-oss # Set this to the correct number of cards. options snd cards_limit=4 -- If you have a problem and you are not doing anything to fix it, you are at the heart of the problem.