sudo alsamixer
sudo alsactl store
arecord -l
aplay -l

Available options:

  -h,--help           This Help
  -c,--card N         Select The Card
  -D,--device N       Select The Device, Default 'Default'
  -d,--debug          Debug Mode
  -n,--nocheck        Do Not Perform Range Checking
  -v,--version        Print Version Of This Program
  -q,--quiet          Be Quiet
  -i,--inactive       Show Also Inactive Controls
  -a,--abstract L     Select Abstraction Level (None Or Basic)
  -s,--stdin          Read And Execute Commands From Stdin Sequentially
  -R,--raw-volume     Use The Raw Value (Default)
  -M,--mapped-volume  Use The Mapped Volume

Available commands:

  scontrols           Show All Mixer Simple Controls
  scontents	      Show Contents Of All Mixer Simple Controls (default command)
  sset sID P          Set Contents For One mixer Simple Control
  sget sID            Get Contents For One mixer Simple Control
  controls            Show All Controls For Given Card
  contents            Show Contents Of All Controls For Given Card
  cset cID P          Set Control Contents For One Control
  cget cID            Get Control Contents For One Control