gene said:
As for SACD, usually the DSD is handled by a true DSD DAC and then converted to PCM for BM and Time Alignment.
I am sorry for correcting you, but the conversion DSD->PCM is in the digital domain before DACs and even Digital filters (if they are not implemented in DACs).
expletive said:
Wouldnt the DSP, not the DAC, convert the DSD signal to PCM in the D1?
No DSP in the consumer market can accept DSD stream yet, except of the newly designed Sony chips
SACD without BM or TA is a step backwards imo. So unless the Yamaha can do TA and BM without converting to PCM, i see no advantage over the D1.John
Yamaha can do both - with and without conversion.
kmmd said:
Thanks for the update Gene.
Unfortunately, there is still no info on how or where DSD -> PCM for SACDs' will be performed. Oh well, I guess we'll just wait and see. I do look forward to Anthem's White Paper.
Actually there is only one known way - SM5819A convertor (in older devices SM5916A). I bet it is used in D1.
kmmd said:
After the Sony CXD-2753 Second Generation DSD Decoder (again not mentioned in the D1), I believe that the data goes directly to the
Analog Devices SHARC Melody 100 Audio Processor. Pages 3 and 4 of the data sheet, provided in the above link, highlights the key features and hardware architecture of this 32-bit processor.
NO one DSP, including Melody, supports DSD stream. In 5900 the same SM5819A is used. It is also used in Sony 9000, AX10Ai/59TXi and Z9.
Here is an article concerning DVD-A and SACD
http://www.digit-life.com/articles2/sacd-dvd-a/index.html. I believe the DSD->PCM conversion is the only one way to play SACD disks with the best possible quality (not even taking in mind the TA and BM) due to the removing of intermodulation distortions from high level of out-of-the-band noises in DSD.
I can ABX the difference with 100% probability through quite good PCM1738 DACs (the same analog filters for DSD stream as in PCM1792) and through SM5816A conversion ... and then through PCM1704.
IMO Anhem engineers used the best way - DSD->PCM and High-End DACs. It is funny that Sony engineers used the same way in their top 9000ES receiver, though without High-End DACs ...