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Nicholas Saunders
Asked: 2021-09-12 12:57:42 +0800 CST

Why doesn't the audo utility "jack" show codecs which are installed?

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When starting up jack with the command hdajackretask the GUI reports that there aren't any codecs for recording audio. Off the top of my head, this seems nonsensical as I'm using Text Now and other VoIP apps without problem:

jack

nicholas@mordor:~$ 
nicholas@mordor:~$ sudo apt install ubuntu-restricted-extras
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
ubuntu-restricted-extras is already the newest version (67).
0 upgraded, 0 newly installed, 0 to remove and 154 not upgraded.
nicholas@mordor:~$ 
nicholas@mordor:~$ uname -a
Linux mordor 5.11.0-34-generic #36-Ubuntu SMP Thu Aug 26 19:22:09 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
nicholas@mordor:~$

Admittedly, the output of a command to list codecs wasn't immediately and easily human readable -- at least to this human.

The GUI documentation shows:

Start the application "hdajackretask" from the command line. Select a codec in the top bar; some people have only one - if you have more than one, one is the "main" one, and the rest are probably HDMI codecs.

which in no way addresses the fact that no codecs are found by jack itself.

sound

0 Answers