Denon 2910 and 3910 upsample redbook??

No 2910 and 3910 do not up-sample Redbook. 3910 converts Redbook from 16 to 24 bit using 32 bit ADSP. Of course, at least 8 times linear oversampling is done in the Digital filter for CD which is a feature of the actual DAC. Further more the oversampled data is converted to Bitstream inside the DAC too.

When people refer to up-sampling they mean non-linear conversion of 44.1 to 96 or 192 kHz sample rate. As I mentioned in my previous posts, since 96 and 192 can not divide by 44.1 the actual CD (redbook) data is slightly truncated so the up-sampled version is actually worse than the original and this is the reason why the available up-sampling machines does not sound right (it is artificial to me). This is also the reason why the wiser DSP engineers prefer just data word expansion as there is no truncaton using this method and it still helps utilizing the latest 24 bit DACs which results in extracting even the last detail out of Redbook CD.

Regards,
Alex

Meisterkleef I agree with you. Of course the Digital Filters (stand alone or built in the DAC) do not have the ability to perform non-linear interpolation. You are also right that the data truncation is happening in low-order bits but it's still present and I can hear it. It is most noticeable at the high frequencies which makes me crazy - I can not listen to it. I have tried some of the World's best re-sampling software using VERY sophisticated algorithms to convert 44.1 to 96 or 192 but the result is the same - I hear it. What I found also is that even a linear upsampling to 88.2 and 176.4 is not that good as some dynamics are lost. Playing with the above mentioned computer programs have proven to me that the best you can do to a CD is to convert it to 24 bit and keep the original sampling rate.

Regards,
Alex

Daltonlanny, there are many digital players out there to "up-sample" to 96 or 192. What I am saying applies for all of them. Example that comes to mind is Audio Aero Capitole (or whatever). It is so irritating that I can not listen to it for more than 10 minutes. As I mentioned, I have also used some really sophisticated computer programs to convert 44.1 to 96 or 192. Although the result is somewhat better, I hear the same problems.

Regards,
Alex

Ron, I would LOVE to put my Denon 3910 against the dCS because I already know how it compares to DAC6e. I've heard it here in my own system.

Please let me know if that can be arranged. Thank you!

Regards,
Alex