Alsamixer Master doesn't control line out

[terry1769]

Hi,
I have the audioinjector zero card attached to a Pi zero w. I'm using it in an application where I need to control volume in and volume out by code so using the pots isn't workable. I've found that I have no control over Volume Out. In Alsamixer I can run "Master" all the way to the top or bottom and the sound always stays at full volume. If I use the attached headphone outlet Master controls volume as expected. Is there a way around this or do I just need to attach to the headphone port for my output?

[terry1769]

2 weeks and 65 views and not a single answer from the mods. And they just sent me a notice that they're launching a new product. Yeah, I think I'll skip that one.

[flappix]

Same problem here.

Using the volume controls from jack application seems to work so it's not too bad for me. But of course that's not always possible so a fix / hint for problem solving would be very nice.

[moggyd]

Take a look here:

https://unix.stackexchange.com/question ... m-terminal

You can use amixer to change most of the settings on the fly.

Don't install/use the pots - they just introduce noise.