On Thu, Nov 20, 2008 at 05:46:49PM -0800, Shane W wrote: > On Fri, Nov 21, 2008 at 09:36:55AM +0800, Wu Fengguang wrote: > > > > > supports coding type AC-3: channels = 6, rates = 44100 > > > 48000 88200, max bitrate = 640000 > > > supports coding type DTS: channels = 7, rates = 44100 48000 > > > 88200 176400 192000, max bitrate = 1536000 > > > supports coding type DSD (One Bit Audio): channels = 6, > > > rates = 48000 > > > > It's weird that DTS supports 7 channels while DSD supports 6. > > DTS is simple the compressed form of DSD. > > Hmm, I thought DTS was just another way of compressing PCM > whereas DSD is the format used on SACD disks, IE 6 channel. > http://en.wikipedia.org/wiki/Direct_Stream_Digital
Well my source is a bit different ;-) http://en.wikipedia.org/wiki/Super_Audio_CD DST To reduce the space and bandwidth requirements of DSD (2.8 Mbit/s per channel), a lossless data compression method called Direct Stream Transfer (DST) is used — DST compression is compulsory for multi-channel regions and optional for stereo regions. This typically compresses by a factor of between two and three, allowing a disc to contain 80 minutes of both 2-channel and 5.1-channel sound. > > > The speakers 0 line is a bit confusing, not sure if that's > > > > Yes it's unexpected. Do you know its real speaker numbers and > > allocations? Does it provide some number of line-out ports? > > There are six speakers connected, fl, ct, fr, rl, rr and > lfe. Takashi, I'd suggest to support writing to the ELD proc interface to alter the internal ELD struct. This could let users debug/fix quicks conveniently. But sure these fixes should eventually be incorporated into the kernel so that it just works. > > > what's doing it. I am using: > > > aplay 51test.wav > > > > > > which I have put here: > > > http://www.csy.ca/~shane/51test.wav > > > > I hear only "front left" and "front right" in my T61 :-) > > Yeah, you should get: > Front left > Center > Rear left > Rear right > and a little boom from the sub > > If you encode 51test.wav to ac3 and stream through hdmi > directly, it does this properly. OK, so 5.1 AC3 audio plays properly on HDMI? Thanks, Fengguang _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
