“The major feature of the Xtreme Sound 7.1 with Dolby Digital Live is obviously the DDL 5.1 support. This feature is great for music and movies as the upsampling of non-5.1 sources is excellent and the use of optical interconnects makes wiring a breeze. For gamers with 7.1 speakers should probably use the analog connections and not use DDL as it only supports 5.1 channels. So you will lose any effects that would have been produced on your rear speakers would be lost. If you play games on 5.1 speakers (which is a majority) you should feel free in using them if your speakers support Dolby Digital.”