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Old 06-26-2020, 05:28 AM   #1
Registered: Aug 2018
Location: New Zealand
Distribution: Fedora / KDE
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ALSA - 2 Default Devices (Output + Input)? W/ Device Labels

How can I set up ALSA so that my output device (USB DAC) is the default device, but my input device (USB microphone) works as well?

I read on a thread elsewhere that you can put this in your ~/.asoundrc:

pcm.!default {
  type asym
    type hw
    card 0
    device 0
    type hw
    card 1
    device 0
Assuming this works (obviously, with the correct card number e.g. card 2), how can this be done with, for want of the right term, permanent device labels?

I regularly turn on and off my USB DAC's and the ordering of the DAC's and the microphone gets messed up, so using "card 0" for my DAC does not consistently work.
Old 06-26-2020, 08:30 AM   #2
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Whenever a question of labeling devices comes up, the right answer is usually udev. On RedHat, the file is /lib/udev/rules.d/60-persistent-alsa.rules Here is an article on adding your own rules:
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Old 06-27-2020, 03:16 AM   #3
Registered: Aug 2018
Location: New Zealand
Distribution: Fedora / KDE
Posts: 34

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Thanks. I notice I have this 60-persistent-alsa.rules file in both lib and lib64; both say "do not edit this file - it will be overwritten on update".

In the article it says the file is in: /etc/udev/rules.d/70-alsa-permanent.rules

Should I create this file (it doesn't exist) and then proceed? If pacman update will ruin my rules then I see no point in editing the file in /lib or /lib64 .

I'm on Arch.


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