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:

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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.

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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.

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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