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Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it.


There were so many great things said for so long about the sound of "non-oversampling" (filterless) DACs that I was very curious. I think that part of the results may be dependent on the architecture of the DAC itself, and also the system into which it is placed.

By having no digital filter, the analog output is a "stair-step" signal. This can be smoothed with analog filtering. Many NOS DAC designs have transformers in the analog stages, which tend to roll off the ultrasonic frequencies quite rapidly.

Even then there will be "aliasing" and other high-frequency artifacts in the signal that will disturb some preamps and amps more than others. So different people may reach different conclusions, especially considering the wide variety of systems in use.

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  • RE: GREAT!!!! - Charles Hansen 20:33:34 02/09/09 (2)


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