|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
121.74.194.87
In Reply to: RE: Upsampling everything to DSD SACD posted by Cool_Jeeves on January 05, 2021 at 03:49:54
The DSD clock is an integer multiple of the standard RB sample rate: 64 * 44.1kHz sample rate i.e 64fs is 64 * 44100 = 2.822400MHz
The bitstream runs at 2.822 MHz in order to overcome the limitations of a 1-bit D-S modulator which necessitates aggressive noise-shaping to achieve a decent SNR in the audible range. Consequently, the response may theoretically extend up to 100kHz, but the noise-shaping is designed such that the bandwidth for maximum SNR (120dB) is 20kHz which matches the Redbook specification.
Regards Anthony
"Beauty is Truth, Truth Beauty.." Keats
Follow Ups:
Yes. You are right. I forgot. Actually the SA-10 has two upsamplings - 11.2896MHz and 12.288MHz - being integral multiples of 44.1KHz and 48KHz respectively.
Edits: 01/06/21
So they sensibly maintain the oversampling ratio according to the base clock - I had wondered what would happen in that instance.
Thanks for the info!
BTW Happy New Year
Regards Anthony
"Beauty is Truth, Truth Beauty.." Keats
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: