amixer

[jpeters]

For incremental increases/decreases 'set' command works nicely:

Code: [Select]

amixer set Master 10%+

For turning on things like Mic Booster,  cset numid works. 

Code: [Select]

amixer cset numid=2 on

To find numid:

Code: [Select]

alsamix controls | grep 'Mic Boost'