Audioinjector no input sound

I’m using an audioinjector soundcard and output works fine, but I couldn’t get the input to work. Neither over MOD-UI nor over the “record audio” tool in the menu.

I’m using a raspi 4 and here are my zynthian versions:


zyncoder: [master (f01eb07)](
zynthian-ui: [master (d82d176)](
zynthian-sys: [master (011666c)](
zynthian-data: [master (c8d15e7)](
zynthian-webconf: [master (21a234a)](

Already checked the alsamixer, but it looks fine (compared it to here)

Any hints on where to start fixing that? I already installed the drivers from the github page and changed to RCA with their script.