iFi iDSD Micro DSD512 / PCM768 DAC and Headphone Amp. Impressions, Reviews and Comments.
Nov 23, 2014 at 6:36 PM Post #1,621 of 9,047
If6was9,

What is the amplifier in your setup? Are you certain the switches on the Micro are in the suggested positions?
 
Nov 23, 2014 at 7:38 PM Post #1,624 of 9,047
"Please try "Turbo" off. And double-check the switch is engaged in Direct."

It sounds like you've tried it all. I do believe it's not possible for the Sony CD player to be superior to the iDSD. If I had the same unit as you I would give it a try.

One more question I have is have you got an audio buddy to confirm your impressions?
 
Nov 23, 2014 at 7:41 PM Post #1,626 of 9,047
now such posts confuse the hell out of me, i thought the hugo had a thin sound and i owned and sold it because i found it lacking in bass and warmth, now from the quoted post above i see that the ifi is even less warm and with lower bass quantity why on earth can't people agree on things which should be easy to determine 
The differences in impressions are most likely due to difference in upstream gear and the recording being played. Plus there's the digital filter. One may be using the Standard/Bit-Perfect, the other Minimum Phase filter. I can tell/hear for certain that Standard and Bit-Perfect filters are on bright side, Minimum Phase definitely on warm side with more deep bass and lower frequency body/mass.
 
Nov 24, 2014 at 5:07 AM Post #1,627 of 9,047
Some interesting news. Now DSD native (non DoP) support up to DSD512 is possible in linux from next kernel 3.18.x and alsa 1.0.29.
It is possible to try this compiling new kernel with the patches at the link below and alsa-git. To test it you must compile last version of mpd-dsd.
 
I have tested the new driver and is working fine with iFi iDSD micro! Our DAC is one of the few supported!!!
 
See
https://github.com/lintweaker/xmos-native-dsd --> source and patches
http://audio-linux.com/ --> beta version of Archlinux with DSD512 support
http://www.computeraudiophile.com/f11-software/hqplayer-kick-start-guide-and-feature-requests-20870/index13.html --> beta version of HQplayer with new format support
 
Nov 24, 2014 at 5:20 AM Post #1,628 of 9,047
How can I play DSD natively using Mac and iPhone? Onkyo HF Player outputs DoP--this is not native DSD?
 
Nov 24, 2014 at 5:38 AM Post #1,629 of 9,047
For linux
DSD DoP: the DSD signal is encapsulated in a PCM container, but not converted to PCM. In this case iDSD can play only up to DSD256. 
DSD native: the DSD signal is sent as it is to the DAC. iDSD can play up to DSD512
 
For Mac, I think that playing up to DSD256 is possible. Enabling and possibly upsampling to DSD512 maybe will be possible with the next incoming version of HQplayer for Mac.
 
Interesting measurements about upsampling in iDSD:
http://www.computeraudiophile.com/blogs/miska/ifi-idsd-micro-measurements-632/
 
Nov 24, 2014 at 8:18 AM Post #1,630 of 9,047

wow, interesting graphs.
am I wrong in interpreting these graphs that
 
a) BitPerfect filter is the noisiest
and
b) upsample to 768/24 or DSD512 if possible?
 
Nov 24, 2014 at 8:33 AM Post #1,631 of 9,047
wow, interesting graphs.
am I wrong in interpreting these graphs that

a) BitPerfect filter is the noisiest
and
b) upsample to 768/24 or DSD512 if possible?


I thought the noises in bit perfevt is being discussed long ago? And yes, I do norice some noise but only when silent, with music playing, it can't be heard.
 
Nov 24, 2014 at 8:40 AM Post #1,632 of 9,047
Yest BitPerfect is the noisiest but probably is the best for impulse response (and this is very important for audio quality).
 
Personally in this case I think the best is upsampling to the highest possible value (possibly with a polynomial function, that will preserve impulse response)
 
Nov 24, 2014 at 8:56 AM Post #1,634 of 9,047
Yes I know that it is possible. Only on linux DSD512 was not possible until now.
 
Nov 24, 2014 at 9:08 AM Post #1,635 of 9,047
For linux
DSD DoP: the DSD signal is encapsulated in a PCM container, but not converted to PCM. In this case iDSD can play only up to DSD256. 
DSD native: the DSD signal is sent as it is to the DAC. iDSD can play up to DSD512

For Mac, I think that playing up to DSD256 is possible. Enabling and possibly upsampling to DSD512 maybe will be possible with the next incoming version of HQplayer for Mac.

Interesting measurements about upsampling in iDSD:
http://www.computeraudiophile.com/blogs/miska/ifi-idsd-micro-measurements-632/


Thanks for the reply.

How about Audirvana and Pure Music? Can they play native DSD? And up to DSD512? Checked their website and I can't see anything that says DSD512.
 

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