How does 5.1 surround work? Logitech Z-640 + Generic sound
card- Ectiva  By jax Feb 11, 2005 Topic Status: Not open for
further replies.   1. I recently got the Logitech Z-640, and
everything seems to work fine, my only question of curiosity is
the fact that when something makes a noise, hence, music or
windows, you can only hear it from the center, and front left
and right speakers, and sub, whereas if you play a dvd of course
it is 5.1, and thats the only time i get full use of my
speakers.     How do you make ALL the speakers play at the one
time?     Help much appreciated   2. BringinHeat
BringinHeat Newcomer, in training Posts: 171      Well the
reason only those channels work is becuase most mp3s and music
are formated for stereo (2 channels you can press the matrix
button on your speakers to have a virtual surrond three speakers
playing) and not 5.1. The only time you hear from all five
speakers is if the medium you are listening to is either dolby
digital or formated for 5.1. THis also depends on