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What DSD sampling rates are there?
Jun 22, 2016 at 5:19 PM Thread Starter Post #1 of 11
Duncan

Duncan

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Hi all,,,

Before we say DSD64, 128 and 256 - am aware of those, however - I can play 6.14mhz and 12.28mhz with no problem, and neither comply with the DSD standard...

Proof of this as below:



So, for those more in the know than me, just seeing if it depends on DAC implementation (Pioneer U05 here) as to whether the DAC will play back non-standard sample rates, or - if sigma / delta (DSD) doesn't really care what sample rate is being received.

Thanks :)
 
Jul 4, 2016 at 10:24 PM Post #2 of 11
I'm pretty sure DSD64 is the SACD format standard. Those other file formats are probably from digital recorders used to convert high res audio from DVD-Audio and other non native DSD sources and sold to you from "Hi Res" online distributers. But the actual retail music in SACD form is DSD64.
 
Jul 5, 2016 at 2:41 AM Post #4 of 11
jiiteepee said:
What 'bout the specs and performance of the Pioneer U05? Didn't OP checked those?
Click to expand...
thanks, but that isn't the point, DSD is said to be 2.8 or 5.6, yet I can get 6.144

Think I've worked it out on my own though, that the regular numbers are multiples of 44.1, the non standard - 48khz...

Just interesting, if nothing else, that DAC manufacturers don't mention this.
 
Jul 5, 2016 at 4:14 AM Post #5 of 11
duncan said:
thanks, but that isn't the point, DSD is said to be 2.8 or 5.6, yet I can get 6.144

Think I've worked it out on my own though, that the regular numbers are multiples of 44.1, the non standard - 48khz...

Just interesting, if nothing else, that DAC manufacturers don't mention this.
Click to expand...

 
By reading the documentation related to U05 and hardware in it  (ESS DAC chip, etc.) you would have find info regarding the matter you are now wondering of?
 
Jul 6, 2016 at 4:02 PM Post #6 of 11
jiiteepee said:
By reading the documentation related to U05 and hardware in it  (ESS DAC chip, etc.) you would have find info regarding the matter you are now wondering of?
Click to expand...
It's nothing to do with the DAC per se, was curious as to how many different (non-standard) DSD rates there were..

Anyhow, as said, I've closed it off myself (multiples of 44.1 vs multiples of 48, but the DSD DAC manufacturers only refer to the 44.1 multiples)
 
Jul 6, 2016 at 4:25 PM Post #7 of 11
It is indeed not part of the standard as far as I know
A couple of manufacturers however do seem to support both the 44.1 and the 48 range.
 
An example:
in addition to the DSD64 (5.6448 Mbit/s) and DSD128 (11.2896 Mbit/s) bit rates, Callia also supports the 48kHz-derived rates of 6.144 Mbit/s and 12.288 Mbit/s
 
Click to expand...

http://www.prismsound.com/hifi/products_subs/dac1/dac1_spec.php
 
Jul 6, 2016 at 11:20 PM Post #8 of 11
DSD64 = 64x44,100kHz = 2,822,400gHz
DSD64 =64x48,000kHz = 3,072,000gHz
 
If you are upsampling it will just depend on the original sample rate whatever is integer this will be less taxing on your CPU and the math involved will be divisible no rounding errors.  The newer HQplayer now has the auto function so you don't have to pay attention to the sample rate anymore.  Before I would have to adjust between 44.1 and 48 sample rates.  Its all in the math to make it integer.
 
Jul 7, 2016 at 4:53 AM Post #9 of 11
duncan said:
It's nothing to do with the DAC per se, was curious as to how many different (non-standard) DSD rates there were..

Anyhow, as said, I've closed it off myself (multiples of 44.1 vs multiples of 48, but the DSD DAC manufacturers only refer to the 44.1 multiples)
Click to expand...

Yes, regarding those DSD formats, there's https://en.wikipedia.org/wiki/Direct_Stream_Digital
 
There's mention in those documents of formats U05 supports and if you digged the available documentation of hardware related to U05 implementation then you'd know Fs up to 40MHz is supported as input (dunno if U05 supports this high Fs input) ... but, who cares what you can input if the source audio needs first to be upsampled before sending to device (as image linked in your opening post shows) and then downsampled at some point to usable rate for the DAC.
 
Jul 8, 2016 at 5:05 PM Post #10 of 11
It isn't up and down, it is just up (using HQPlayer) - no down converting required (the U05 can accept 11.2mhz, just isn't advertised as such), and I still feel the point has been lost... but, as the French say, C'est la vie :)
 
Jul 9, 2016 at 4:01 PM Post #11 of 11
duncan said:
It isn't up and down, it is just up (using HQPlayer) - no down converting required (the U05 can accept 11.2mhz, just isn't advertised as such), and I still feel the point has been lost... but, as the French say, C'est la vie
smily_headphones1.gif
Click to expand...

 
Any sources to confirm what's said in text above and in your opening post.
By specs U05 supports 5.6MHz and ESS Sabre Ultra DAC chip upto 11.2MHz but, in your opening post you say that you can feed those 48kHz based DSD streams up to 12.28MHz as well and now say even without downsampling to max supported rate by U05. One way to try confirm your words would be a camera shot of U05's display showing the locked sampling frequency for those rates outside specs given by Pioneer/ESS.
 
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