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RE: No..

With the foobar2000 converter the filter rolls off around 70 Khz. If one looks at the 192/24 PCM samples (zoom in to individual samples) one can clearly see the residual high frequency noise. Or one can see it in the "voice print" that I posted, showing a wide area of haze starting around 40 Khz. I don't like the Weiss strategy. I'd rather have some of this noise than have musical signal filtered out by the converter. But the real problem is with DSD itself and/or the modulators used to create DSD bitstreams. They create this damn noise, and the noise isn't pure like properly dithered PCM, it's all tied up with the musical signal.

From implementing and then evaluating the output of some sample modulators published by Philips engineers I found that 1-bit noise is still present below 20 kHz, albeit at low levels. I don't believe these published modulators can even encode 44/16 PCM and get back the original 16 bit samples unchanged, proving in one sense that DSD has lower resolution than RBCD. But perhaps this was because I wasn't decoding these modulators correctly. If someone has links to papers on this subject I would be interested. My guess is that it will never be possible to get decent encoding out of a D-S modulator, but I believe it may be possible to design a different type of encoder that will do better. (If you read the DSD encoding section of the SARACON manual you will see that Weiss's encoder has a lot of klugery to prevent it from "lockup" caused by signal overload. A dubious system design, IMO.)



Tony Lauck

"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar

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