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Rethinking NOS

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It was many years ago that I joined the NOS camp. The theory of the day said oversampling was much better but my ears told me otherwise. A lot has changed since then. Although the theory is still the same, the implementations of the theory are much better. First-generation resamplers used narrow, fixed-point math and integer filter coefficients because that was the best the available hardware allowed. Later generation resamplers were more precise but were usually coupled with delta-sigma DACs. Today’s multi-cored PCs are orders of magnitude more capable than even the most recent dedicated resampling chips. Better yet, you have a wide choice of resampling algorithms.

It certainly can’t hurt to try. All you need is a PC with a digital audio interface capable of 88.2K or higher and a DAC with a CS8414 or better. To tell the truth, I don’t listen to 44.1K anymore. For me, the benefits of 176.4K are similar to the improvements I got with the CS8415A and right-shifting the samples. The two together are a win-win. Plus, I haven’t lost any of the attributes that attracted me to NOS in the first place. Meanwhile, I’m working on my ‘filterless’ resampler, which should be even better.


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