Hi. I hope you guys can help me with 3 problems I have. I have a usb device which has 3 streams - which all work fine (that's not the problem yet ;)). Aside from this there is also a mixer created. Alsa cannot retrieve any information from the mixer - not the minimum, nor the maximum or current value. Basicly alsa leaves the mixer in a state where it cannot be used - which leads to a question why not omnit the mixer? What I am ending up with are these 2 volumes: [4] FU [PCM Capture Volume] ch = 1, val = 0/1/1 [9] FU [PCM Capture Volume] ch = 1, val = 0/1/1

What would I have to do to disable these? Is it enough to define a usbmix_name_map in usbmixer_maps.c with {4, NULL} and {9, NULL}?

Also, the usb device has a switch - from line input to phono input. I know what control message I have to send to change the switch - but where has such an additional switch to be implemented? Is it similar to snd_audigy2nx_led_get in usbmixer.c?

Would be great if someone could explain these mysteries to me ;)