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The document is a bunch of BS.....written by someone who knows nada

Posted by Ric Schultz (M) on July 8, 2010 at 12:43:05

In Reply to: RE: Here is a link to the Sony document. posted by ahendler on July 7, 2010 at 14:52:45:

Sony likes to claim they are using their own DACs.....this is not true....There is no such thing as an "SA" DAC. They are simply using Burr-Brown DACs. They do not convert to one bit. They are multilevel DACs as explained in the paper. They have been using Burr-Brown DACs for years and claiming them as their own thing....total BS! In fact, they used to call the Burr-Brown DACs "current pulse" DACs....because that is what their own older DACs were called and they wanted to make it seem that they were still doing the same thing. They even had Burr-Brown put different numbers on the stock parts to make it seem it was not just a stock Burr-Brown part. What will they call the stock Burr-Brown DACs next year when they release another machine?....Super Duper Current Pulse SA DACs Gen II? How about Burr-Brown?, Sony. What, you cannot tell the truth?

There are numerous errors in the paper. Page 9 shows a pic of the Burr-Brown DAC and says it is a multichannel chip. Page 17 says there are six channels of "SA" DACs....totally wrong, and page 29 says there are 12 SA DACs. Totally wrong again. The 6 and 12 numbers came from the older XA series where they used a bunch of Burr-Brown DACs in parallel. Someone who wrote this paper merely passed the info along as if its still true in this machine.

There is only one stereo Burr-Brown chip in the 5400. It does not convert the signal CD signal to one bit. It does the same job that hundreds of other machines do with the same burr-Brown DACs. By the way, almost all the existing DACs today by all the companies use similar types of DACS (AKM, Analog Devices, Cirrus Logic, etc.). This in now the defacto standard. Other names they go by is "Advanced Multibit....or Multibit Delta Sigma". Same basic thang. No conversion directly to one bit.....but a mixture of one bit and multibit.....at least that is what I gleem.

As I said in my original reply, there are two, maybe more companies that directly convert 16/44 to double speed DSD one bit and then convert. By the way, the Korg software can do such a thing....ie, convert 16/44 directly to DSD (single or double speed). As far as I know, there are no single bit DACs being produced today....the Philips, Sony and NPC converters are long gone....(Playback design and Meitner make their own discrete one bit converters....not off the shelf parts).

Edits: 07/08/10 07/08/10 07/08/10 07/08/10 07/08/10 07/08/10

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