Jump to content
Sign in to follow this  
Masterstroke

Double upsampling

Rate this topic

Recommended Posts

I’m going to be soon installing a Meridian Explorer2 USB DAC, and am a bit concerned over the impact of A+ upsampling on the Meridian which itself upsamples to 24/192. Should I set the A+ (3.0.6) forced upsampling to “none” (currently on 24/96) to avoid doubling up? Seems to me that processing the music twice in this way would be a bad thing. Any views on this please?

Edited by Masterstroke

Share this post


Link to post
Share on other sites
45 minutes ago, Masterstroke said:

I’m going to be soon installing a Meridian Explorer2 USB DAC, and am a bit concerned over the impact of A+ upsampling on the Meridian which itself upsamples to 24/192. Should I set the A+ (3.0.6) forced upsampling to “none” (currently on 24/96) to avoid doubling up? Seems to me that processing the music twice in this way would be a bad thing. Any views on this please?

 

Most who choose to upsample do it to the maximum rate their DAC will accept; e.g., 24/192 for your Meridian.


John Walker - IT Executive

Headphone - MacMini running Roon Server > Netgear Orbi wireless > Blue Jeans Cable Ethernet > mRendu Roon endpoint > iFi Audio xDSD + iFi Audio xCAN > Focal Elegia

Home Theater - Mac Mini running Roon Server > Blue Jeans Cable HDMI > Pioneer Elite SC-81 > MartinLogan Motion series home theater speakers + M&K subwoofer

Share this post


Link to post
Share on other sites

So I set the A+ upsampling to 24/192 and the Meridian then auto upsamples it for a second time?

Doesn't seem right to me. Or have I completely misunderstood the interaction between player & DAC?

Edited by Masterstroke

Share this post


Link to post
Share on other sites
6 minutes ago, Masterstroke said:

So I set the A+ upsampling to 24/192 and the Meridian then auto upsamples it for a second time?

Doesn't seem right to me. Or have I completely misunderstood the interaction between player & DAC?

 

No.  Anything at lower rates is upsampled.  If the DAC accepts 24/192 it (or 24/176.4) bypasses the internal PCM upsampling.  I'm guessing the DAC then uses sigma-delta modulation to megahertz rates before final conversion to analog.


One never knows, do one? - Fats Waller

The fairest thing we can experience is the mysterious. It is the fundamental emotion which stands at the cradle of true art and true science. - Einstein

Computer, Audirvana -> wi-fi to router -> EtherREGEN -> microRendu -> USPCB -> ISO Regen (powered by LPS-1) -> USPCB -> Pro-Ject Pre Box S2 DAC -> Spectral DMC-12 & DMA-150 -> Vandersteen 3A Signature.

Share this post


Link to post
Share on other sites

Thanks Jud. So really it doesn't matter how low I set the A+ sample rate it will get the 24/192 treatment when it reaches the DAC. I guess the same applies if my music is of higher (than 24/192) sample rates, it will get downsampled to the Explorers maximum. My concern was that too much processing might cause SQ problems.

Share this post


Link to post
Share on other sites
7 minutes ago, Masterstroke said:

Thanks Jud. So really it doesn't matter how low I set the A+ sample rate it will get the 24/192 treatment when it reaches the DAC. I guess the same applies if my music is of higher (than 24/192) sample rates, it will get downsampled to the Explorers maximum. My concern was that too much processing might cause SQ problems.

 

You can think of the situation with lower resolution files/rips as having your choice of A+ upsampling or the DAC's internal upsampling, whichever you prefer.


One never knows, do one? - Fats Waller

The fairest thing we can experience is the mysterious. It is the fundamental emotion which stands at the cradle of true art and true science. - Einstein

Computer, Audirvana -> wi-fi to router -> EtherREGEN -> microRendu -> USPCB -> ISO Regen (powered by LPS-1) -> USPCB -> Pro-Ject Pre Box S2 DAC -> Spectral DMC-12 & DMA-150 -> Vandersteen 3A Signature.

Share this post


Link to post
Share on other sites

After many, many months of trying various upsampling systems, Audirvana +, HQPlayer to DSD128/256, i gave up the quest as a fruitless exercise. The sound was ok, but never quite satisfied, 'natural' sampling was more engaging, sounded less thinner and overall easier to listen to. PCM upsampling didn't fare much better really since the DAC internally upsamples to DSD anyway.

 

Now, very reluctantly, mainly due to the attitude of the owner, I use Jriver again as library management is very important equaling SQ. I don't like to spend time repairing A+'s current quirks with file management, and HQPlayer's non existence. OK, I can wait for the 500ms for the DAC to change the sample rate and lock onto the new and hear a relay click. As for the sound out of Jriver, it gets the job done.

 

Far more important is the DAC's ability to playback Redbook, if this quality is good, then any other different sample rate file generally follows the same pattern. 


AS Profile Equipment List        Say NO to MQA

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×
×
  • Create New...