Uaudio0: class v1, full-speed, sync, channels: 2 play, 1 rec, 8 ctls Uaudio0 at uhub2 port 1 configuration 1 interface 1 "ABC C-Media USB Audio Device" rev 1.10/1.00 addr 2 It either corresponds to a hardware control or is emulated in software.Īn example of a USB audio interface in a dmesg output might look like this: The output.level control is always present. Running it with no arguments will list all the controls and current settings. Utility is used to manipulate audio controls as a regular user. To make the changes take effect on each reboot, edit the Some devices have multiple microphone inputs. This switch is typically used for power saving in laptops and may need In the example below, the device has a master recording level and a
Multiple mute or level controls in the signal path. Try different settings to see what effect each control has.Įven if the main controls seem to be properly set, there might be Usually the controls have a meaningful label, but sometimes one must simply The controls of an audio device may be labeled differently. There may be, for example, more outputs listed than are physically connected. Not every option of every audio chip necessarily reaches the outside world. Will list all of the controls and current settings. Some have no controls at all others have a hundred or more. # echo =1 > /etc/nf Configuring Audio HardwareĮach sound card model has its own set of controls. Recording a Monitor Mix of All Audio Playbackįor privacy reasons, audio recording is disabled by default in OpenBSD.
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