In Reply to: Re: DSD1790 in Denon 2900 posted by audiophilect on April 20, 2007 at 14:13:58:
I don't think the block diagram is correct. There would be no need for special analog filters in "DSD mode" if the signal were converted to PCM....there would be no additional out of band noise to filter.....so, I don't think the 8 times oversampling filter is used in DSD mode. When you see a DSD signal converted to PCM there is no "DSD out of band noise" on it(observed with Ocsilloscope). I have seen the output of all the Burr-Brown DSD DACs and everyone of them have the "DSD out of band noise" on them...even the $4.00 8 channel jobbies. The Oppo players that play SACDs convert the DSD signal to PCM at 24/88 and the output waveforms looks exactly like a 24/88 output..no additional noise.
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Follow Ups
- don't think 1796 converts to PCM - Ric Schultz 16:19:18 04/20/07 (6)
- You are right, Ric - Charles Hansen 17:49:08 04/20/07 (5)
- Re: You are right, Ric - audiophilect 12:01:50 04/21/07 (1)
- specs? who need em?!? he he - Ric Schultz 10:02:34 04/23/07 (0)
- 1790 DAC chip - Ric Schultz 11:38:26 04/21/07 (0)
- they used the 1790 - Joe Murphy Jr 10:15:48 04/21/07 (0)
- a bit of speculation on my part - Christine Tham 23:21:46 04/20/07 (0)