5.1 sound system. sound comes from only 2 speakers. why??
5.1 sound system not working. sound comes from only 2 speakers. other 3 speakers not working. sound system; creative sbs a520
iMac, Mac OS X (10.7.5)
You obviously need 5.1 encoded audio to begin with.
Open the unfortunately named "Audio MIDI Setup" program in your Utilities folder. It will show you the output options available for your selected audio receiver.