I've tried using both raspbian and vulumio to play through a receiver, and it's ridiculously quiet. I have to max everything out on the receiver to barely hear anything. I've tried going into amixer and maxing out the volume in there, and you can tell it does raise the volume, but not enough. I've looked around online, and everyone who has this issue seems to have fixed it with the mixer, but it's not enough for me.
I don't think it's the receiver, because I can play other things, like my record player, just fine. I think it's just putting out an amazingly low output. Is this a software issue or what? Currently I'm on the newest raspbian build, which is stated to work natively, so I don't know if there is any setting or config I need to edit.