[16:46] <Luca14> Hello. Have an issue with a USB soundcard Behringer UMC404HD on UbuntuStudio  20.04LTS fresh desktop install. Everything seems to work except input channels 1&2. Soundcard front signal led blinks fine when signal 1/2 is there and Qjackctl lists 4 inputs and 4 outputs correctly apparently. But input 1&2 do not carry any signal, even when the
[16:46] <Luca14> soundcard front signal led are blinking (tried Calf and Ardour). Channel 3&4 works fine. Same cards works ok with same Ubuntustudio installation on another laptop. On the desktop, AVLinux live all 4 input channels works fine, Ubuntustudio live most of the times only 3&4, occasionally all 4 channels work without any software/hardware change. Any
[16:46] <Luca14> known issue with that sound card or workaround? Thanks.
[16:50] <OvenWerks> Luca14: does alsamixer show any mutes or low levels?
[16:51] <OvenWerks> I am assuming you are using qjackctl to start jack?
[16:52] <Luca14> No, actually alsamixer shows far less channels than expected,  even in working system. Tried to start jack via Qjackctl, from Arour itself, and eve Ardour Alsa, but same result
[16:53] <Luca14> Is there a place where i can send as screenshot of alsamixer and qjackctl if needed? im not that expert
[16:59] <oerheks> imgur.com
[17:01] <Luca14> oerheks Thanks. OvenWerks alsamixer https://imgur.com/a/skhwuVn
[17:03] <oerheks> is this the whole alsamixer? F11 full screen might show more sliders
[17:03] <Luca14> OvenWerks  first bar was low. You were right. Alsamixer calls channel 1&2 CAPTURE LR MicFront (y)
[17:06] <Luca14> oerheks yes, that's the whole alsamixer. Alsa call the 4 inout channels Mic Front and Rear and L+R. And as OvenWerkshas spotted correctly MicFront level was zero
[17:06] <oerheks> oke
[17:06] <Luca14> Thanks, you made my day (y)