How to play a sound after a command has finished its execution?

Why would surround sound play certain dvds and not play the sound a certain series of others?

• I have a 2 sets of Scooby Doo dvds that my surround sound will not play the sound the picture is fine but the sound won't play, its the only ones that i have found that don't work- others dvds work fine. Why would the sound not work just for those dvds? Also the surround sound speakers won't work with satellite, and the tv speakers won't play with dvd only the surround sound speakers will.

• Answer:

  The DVD's surround sound encoding may not be compatible with the decoder in your receiver. As for the satellite, that is because it is in stereo, not in 5.1, 5.2, 7.1, 7.2, etc. The TV speakers don't work because the audio is being fed through the receiver, not the TV.