Jump to content
IGNORED

Article: Taking the RAAL-requisite SR1a Headphones To Another Level


Recommended Posts

Quote

Sources for this system include Roon, Audirvana Studio, and HQPlayer 

 

Chris, so related to the last few comments....  how are you implementing the convolution? As I understand it, Roon and HQP do it differently. With Roon you use a zip file that has a stereo file for each of the source rates you use and Roon selects the proper one for the file you are playing. . With HQP you have a mono file for each channel at or above the highest rate you use  I don't know about Audirvana.  HQP does do convolution and upsampling of DSD, and unlike Roon does not convert DSD to PCM to do it then back to DSD. Again, as I understand it from correspondence I've had with Jussi. I'm sure he could explain it better. 

 

see my system at Audiogon  https://systems.audiogon.com/systems/768

 

 

Link to comment
2 hours ago, The Computer Audiophile said:

HQP accepts a single filter at whatever rate one wants, in my case 352.8 kHz. 

If I understand your statement you are saying you need to use a filter at the rate you are up-sampling to, which is incorrect. . yes, HQP only accepts a single mono filter for each channel... but according to Jussi, HQP applies convolution at the source rate, not the up-sample rate, so you only need to pick a filter at or above the highest source rate you will be using. 

 

I asked him about this when I had a DAVE. I was using HQP to up-sample to 16fs so was concerned that the Audiolense filters could only go up to 384. His response about using a 384 filter was

 

 Yes, that is fine. Output rate doesn't matter, convolution is performed at the source rate. Except DSD -> PCM case where it is performed at  1/16th of DSD rate.

 

The other part of that is HQP does not use a single stereo file. If you only have a stereo file you need to use a program like Audacity to split it into L-R mono tracks

 

see my system at Audiogon  https://systems.audiogon.com/systems/768

 

 

Link to comment

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



×
×
  • Create New...