NMixer is an interactive text-based sound-mixer control program that you can use to set the volume of
each supported mixer device of your soundcard. It automagically detects all devices that are supported
by your sound hardware, and shows a list of scrollbars for each of these devices.
You can use the up and down arrow keys (or k and j resp.) to scroll though the list of scrollbars (some
do not fit on the screen, but you can reach them by simply scrolling down at the bottom of the screen).
The left and right arrow keys (or h and l resp.) change the volume for the currently highlighted device,
and (if you're lucky), you can use home/end/PgUp/PgDn on the numerical keyboard to set left and right
volume independently. You can also use 0..5 to set the volume to the position indicated by the numbers on
top of the screen.
If a device can be recorded from, red brackets will be displayed under the device's name. If it's
selected as recording source, a red 'X' is displayed as well. You can set a recording device with the
space bar.
If nmixer is compiled with NAS (Network Audio System) support and it's called as 'nasmixer', it will show
the settings for the NAS mixer device.