Hello, everyone and thank you for your help in advance! I have a Sony STR-KS2000 home theater speaker + receiver system which supports Dolby Digital, but as far as I know does not support Dolby Digital Plus. Yet, it seems that when I play Netflix movies with 5.1 sound on my PlayStation 3, they still show as Dolby Digital and I get full 5.1 sound. The confusing part is that I thought Netflix used Dolby Digital Plus as the codec for 5.1 audio, and I thought that Dolby Digital Plus was not backwards-compatible with Dolby Digital. So why am I getting 5.1 audio if my receiver (allegedly) does not support the codec which Netflix (allegedly) is using?