Alsamixer equalizer not working

Troubleshooting
1

I have been using DietPi on a RPi3 with an Audiophonics ES9038Q2M DAC Hat for years. After deciding to upgrade my system to RPi4 the DAC Hat failed and I got a replacement, the new version board with the same name but USB-C connection and some other differences.

One thing I noticed is that with this RPi4 and the new DAC board I can’t use Alsamixer equalizer. I’m running Squeezelite, but that won’t run after boot saying is can’t find default output.

I already tried the solution of changing asound.conf as described in ALSA equalizer not working - #7 by MichaIng

After thr I can run Squeezelite manually by typing ‘squeezelite’ in the command line (or ‘squeezelite -o hw;0,0’, but restarting Squeezelite service (systemctl restart) gives same error as with reboot.

How can I make this work again?

(Running latest DietPi upgrade 8.12.1, but problem existed in previous version too.)

2

What do you mean by “Alsamixer equalizer”? You mean you enabled the ALSA equalizer plugin in dietpi-justboom (or manually) and use the dietpi-justboom menu or alsamixer -D eq to configure it?

Squeezelite doesn’t use that but the default ALSA output device, which should be visible in /etc/asound.conf.