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Denafrips DACs might not actually be NOS?


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12 minutes ago, GoldenOne said:

The weird thing with the ti/bb chips though is that they show different results when you feed it 44.1khz content and use the 'nos/bitperfect' mode, vs using zero-order hold upsampling to 768khz etc and then feeding that to the dac. 

 

Not sure why

 

Because they are not designed to be used in that way. That "NOS/bitperfect" mode is "external digital filter mode". And they assume to be receiving 705.6/768k input instead of 44.1k. If you still send them 44.1k, they are running whole thing at 16x lower rate than designed.

 

Signalyst - Developer of HQPlayer

Pulse & Fidelity - Software Defined Amplifiers

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28 minutes ago, idiot_savant said:

This is interesting - do they adjust the analogue filter for the various DSD rates?

 

Usually more than PCM DACs do. Since typical DSD conversion section is clock rate dependent analog filter. Whereas PCM conversion section doesn't include filtering.

 

Then typically in either case, following the conversion section is normal analog low-pass filter.

 

Signalyst - Developer of HQPlayer

Pulse & Fidelity - Software Defined Amplifiers

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