There's a command called aumix that is very easy to use. Applications->Sound & Video->aumix to open up a aumix terminal. This shows L/R Balance:
Code:
aumix P++++++++O+++++++++++++++++<Vol ++++++++++++O+++++++++++++
++++++++++++++++++++O+++++ Pcm ++++++++++++O+++++++++++++
Quit PO+++++++++++++++++++++++++ Line ++++++++++++O+++++++++++++
Load R++++++++++++++O+++++++++++ Mic
Save P++++++++++++++++O+++++++++ CD ++++++++++++O+++++++++++++
Keys O+++++++++++++++++++++++++ IGain ++++++++++++O+++++++++++++
Mute PO+++++++++++++++++++++++++ Line1 ++++++++++++O+++++++++++++
Only P+++++++++++++++++++O++++++ PhoneIn
Undo P++++++++++++++++++++O+++++ PhoneOut
P+++++++++++++++++++++++++O Video
0 Level 100 L Balance R
Bookmarks