GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Didital Things
In the Thread: High Quality Music Server / CD player

Post Subject: NOS and the highest quality Red Book reproductionPosted by alexd on: 12/19/2008

Hello, I must say you did not listen to NOS DAC properly designed.
Most of the NOS DACs on the market are following minimalist concepts.
Meaning, they merely are just a combination of SPDIF receiver chip and DAC chip itself.
While this approach is working in theory, in practice such a design produces mediocre sound.
The multi-bit non oversampling DAC requires rock solid bit clock to produce accurate sound.
The bit clock is recovered from incoming SPDIF signal. This recovered clock can have excessive amount of jitter.
When such a clock fed to DAC IC, the result is slow sound, compressed soundstage, lack of nuances.
In case of our DAC, we do not use minimalist concept. After 18 month of research and development, we have created
a design, that does not use SPDIF recovered clock at all. The DAC IC sees the clock with less than 3pS of jitter.
The resulting sound is really of "excellent dynamics and unsurpassed sound quality".
As far as accuracy goes, due to the fact that no versampling takes place, every bit of sound you hear is what was recorded on CD.
There are no interpolated samples in the stream, therefore you do not replace recorded samples with interpolated ones.
There is no Delta-Sigma modulation either, we use AD1865N-J highest grade multi-bit DAC IC.
The DAC18 really makes music sound right.

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