Hello, I have just created a ratDVD in which I kept the audio track in AC3 5.1. I do not manage unfortunately to read again this track in AC3 via exit SPDIF. I obtain only LPCM in stereophony. I notched well "Use the SPDIF for reading AC3" in the options, SPDIF functions well (test with a DVD under PowerDVD), I have the last version of ratDVD (0.77). If somebody has an idea to solve my problem, I will be very grateful to him. Thank you in advance. For information, the sound card is a extern SBLIVE 24 (on port USB).