Re: [PLUG] Question on USB audio drivers in linux and Logitech H390 Headphones

[American Citizen]

A note on values found in the /proc folder area with the new Logitech 
H390 headphones plugged in

Plugging in the new headphones, I then jump to the /proc/asound folder 
and dump the usbmixer file and definitely wild stuff comes up!

owner@localhost:/proc/asound/Headset> cat usbmixer
USB Mixer: usb_id=0x046d0a8f, ctrlif=0, ctlerr=0
Card: Logitech USB Headset Logitech USB Headset at 
usb-0000:00:1a.0-1.3, full speed
  Unit: 19
    Control: name="Mic Capture Volume", index=0
    Info: id=19, control=2, cmask=0x1, channels=1, type="S16"
    Volume: min=-1536, max=2816, dBmin=-600, dBmax=1100
  Unit: 19
    Control: name="Mic Capture Switch", index=0
    Info: id=19, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
  Unit: 22
    Control: name="Headphone Playback Volume", index=0
    Info: id=22, control=2, cmask=0x3, channels=2, type="S16"
    Volume: min=-10496, max=0, dBmin=-4100, dBmax=0
  Unit: 22
    Control: name="Headphone Playback Switch", index=0
    Info: id=22, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
  Unit: 25
    Control: name="Extension Unit Switch", index=0
    Info: id=25, control=1, cmask=0x0, channels=1, type="BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
  Unit: 35
    Control: name="Sidetone Playback Volume", index=0
    Info: id=35, control=2, cmask=0x1, channels=1, type="S16"
    Volume: min=-3840, max=0, dBmin=-1500, dBmax=0
  Unit: 35
    Control: name="Sidetone Playback Switch", index=0
    Info: id=35, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
But WHERE OH WHERE are these values stored in a configuration file, so 
that can be fixed?