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Outputting to two sound cards with ALSA - …
https://www.linuxquestions.org/questions/linux-software-2/outputting-to-two-sound-cards-with-alsa-4175550078/
It has two sound cards: one for the internal speakers and headphone jack, and one for the HDMI audio. Originally, the default was the HDMI, but I fixed that with the help of this thread: https://www.linuxquestions.org/quest...er-4175506142/. The configuration that set the internal speaker card as default: /etc/asound.conf.
alsa - Play audio on two sound cards at the same time ...
https://raspberrypi.stackexchange.com/questions/113176/play-audio-on-two-sound-cards-at-the-same-time
I currently try to setup my raspberry pi 3 with a HiFiBerry DAC+ Pro XLR (using Raspian based on Debian 10). I installed the sound card and configured alsa to use device 1 as new default. Restarted raspotify, audio plays now over XLR. (So now i can simply switch between the two devices with no additional configuration) So far so good.
Alsa Opensrc Org - Independent ALSA and linux audio ...
https://alsa.opensrc.org/MultipleCards
An example configuration for two sound cards is like below: # ALSA portion options snd cards_limit=2 alias snd-card-0 snd-interwave alias snd-card-1 snd-ens1371 options snd-interwave index=0 options snd-ens1371 index=1 # OSS/Free portion alias sound-slot-0 snd-interwave alias sound-slot-1 snd-ens1371 The newer "slots=" method
Sound cards - Alsa Opensrc Org - Independent ALSA and ...
https://alsa.opensrc.org/Sound_cards
From the ALSA wiki. We offer a variety of howtos explaining how to set-up and use your sound device. This is also a list of articles about problems that are specific for a certain sound card. However, it is recommended to read the introduction about sound cards first. If you solved a problem that seems to specific to your hardware, please add ...
Output to Multiple Audio Devices with Alsa - Eliot Eshelman
http://www.6by9.net/output-to-multiple-audio-devices-with-alsa/
Once you have your devices figured out and know which output plays where, you instruct ALSA to duplicate the audio output to both of the sound cards. This is the configuration that worked for me (install in ~/.asoundrc or /etc/asound.conf ) – the 2-channel settings are for the headphones (SoundBlaster Live) and the 4-channel settings are for the stereo (onboard …
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