In Reply to: RE: Thanks for the link posted by Todd Krieger on February 11, 2009 at 00:32:25:
"Most oversampling DAC chips only do so for Fs at 48 kHz and below. At least the data sheets I've looked at suggest that."
Looking at the Wolfson 8740 data sheet, this DAC apparently oversamples for inputs all the way up to 192 kHz. The only thing this would do is enable use of a smaller analog post filter..... I personally think digital filtering of 24/96 or 24/192 kHz signals is unnecessary, and probably detrimental. Likely more RFI generated from the extra processing.
I hope the designers of the DACMagic didn't design the filter options controlled from the Wolfson DAC..... With the ASRC feeding the DAC a 24/192 signal, the filter options wouldn't be acting on the 16/44 signal off the CD, but the 24/192 signal fed from the ASRC. (The differences in the filter options would be virtually inaudible running this way.)
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Follow Ups
- Not What I Thought...... - Todd Krieger 01:35:51 02/11/09 (4)
- Like we said above, the Wolfson digital filter isn't used with the DacMagic - Slider 09:26:23 02/11/09 (3)
- Well, That Makes Sense...... - Todd Krieger 11:31:54 02/11/09 (2)
- Upsampling would be part of the DSP code - Slider 11:51:53 02/11/09 (1)
- RE: Upsampling would be part of the DSP code - Charles Hansen 12:38:47 02/11/09 (0)