INTERACT FORUM

Please login or register.

Login with username, password and session length
Advanced search  
Pages: [1]   Go Down

Author Topic: Convolvers and Samplerate  (Read 2033 times)

PMA!

  • Recent member
  • *
  • Posts: 5
Convolvers and Samplerate
« on: January 01, 2018, 01:33:56 pm »
Hi!
I have a somewhat complex question, to me at least. Here I go:

I plan on using JRiver for playing all audio in my custom, 8 channel stereo setup. The DAC has 8 channels, and I will use a program called Audiolense to make convolvers that correct time/phase and EQ for all channels.

Now, when I generat a filter in audiolense, I am told to choose samplerate. However, in the help-file of Audiolense I am told that JRiver will resample the convolver to the correct samplerate. We are getting closer to the question:

I am looking into buying a new soundcard/DAC that has options for either a DSD compatible DAC or 192kHz compatible DAC. Will JRiver be able to sample my convolver to DSD samplerates or is there some sort of bottleneck anywhere?
Logged

Hendrik

  • Administrator
  • Citizen of the Universe
  • *****
  • Posts: 10935
Re: Convolvers and Samplerate
« Reply #1 on: January 01, 2018, 03:14:28 pm »
We don't support processing DSD audio at all, so you can't convolve DSD without converting it to PCM first.
Logged
~ nevcairiel
~ Author of LAV Filters

kr4

  • MC Beta Team
  • Citizen of the Universe
  • *****
  • Posts: 740
Re: Convolvers and Samplerate
« Reply #2 on: January 01, 2018, 04:30:15 pm »
And this is not unusual.  AFAIK, Audiolense and comparable only work with PCM.
Logged
Kal Rubinson
"Music in the Round"
Senior Contributing Editor, Stereophile

PMA!

  • Recent member
  • *
  • Posts: 5
Re: Convolvers and Samplerate
« Reply #3 on: January 02, 2018, 01:24:27 pm »
What if I asked the same question about DXD?
Logged

Awesome Donkey

  • Administrator
  • Citizen of the Universe
  • *****
  • Posts: 7805
  • Autumn shade...
Re: Convolvers and Samplerate
« Reply #4 on: January 02, 2018, 02:03:07 pm »
Huh, that's a good question actually since DXD is PCM at 24-bit/352.8kHz. I'm guessing it depends on what type of files they are?
Logged
I don't work for JRiver... I help keep the forums safe from "male enhancements" and other sources of sketchy pharmaceuticals.

Windows 11 24H2 Update 64-bit + Ubuntu 24.10 Oracular Oriole 64-bit | Windows 11 24H2 Update 64-bit (Intel N305 Fanless NUC 16GB RAM/500GB M.2 NVMe SSD)
JRiver Media Center 33 (Windows + Linux) | iFi ZEN DAC 3 | JBL 306P MkII Studio Monitors | Audio-Technica ATH-M50x Headphones

stanzani

  • Galactic Citizen
  • ****
  • Posts: 463
  • Music and Audio enthusiast
Re: Convolvers and Samplerate
« Reply #5 on: January 02, 2018, 02:26:17 pm »
You cannot do DSP on the DSD stream. This is why they introduced DXD, which is a super PCM ;)
forget about filtering, eq, DRC etc. in the DSD domain, leaving the D upfront as a marketinh hype for DSD enthusisiasts
Logged
Stereo:
DAW: Fanless Case Streatcon 7 with MSI A97I mobo, 2 x 8G RAM (Hynix) with Intel I5 CPU.
NAS: QNAP TS-531 with 5x4TB HDDs
DAC/ADC: RME ADI2 PRO
Speakers (active): 2 x ATC SCM50ASL
Subs (active): 2 x REL 528 Signature

Hendrik

  • Administrator
  • Citizen of the Universe
  • *****
  • Posts: 10935
Re: Convolvers and Samplerate
« Reply #6 on: January 02, 2018, 03:23:09 pm »
DXD is just plain PCM, its not any special, just marketing.
Logged
~ nevcairiel
~ Author of LAV Filters

PMA!

  • Recent member
  • *
  • Posts: 5
Re: Convolvers and Samplerate
« Reply #7 on: January 03, 2018, 01:21:26 am »
Quote from: Hendrik on January 02, 2018, 03:23:09 pm
DXD is just plain PCM, its not any special, just marketing.

Yes, but regardless of what you feel about marketing schemes, will the convolver be sampled higher than 192?
Logged

Hendrik

  • Administrator
  • Citizen of the Universe
  • *****
  • Posts: 10935
Re: Convolvers and Samplerate
« Reply #8 on: January 03, 2018, 05:24:46 am »
Our convolver is not limited. If you can output at such high sample rates, then it'll also process the convolution at those rates.
Logged
~ nevcairiel
~ Author of LAV Filters

amdismal

  • Junior Woodchuck
  • **
  • Posts: 53
Re: Convolvers and Samplerate
« Reply #9 on: January 04, 2018, 02:50:18 am »
As you move to higher sample rates you need more taps - and hence loads of processing power - for lower frequency crossovers and phase correction. You may find that this is the limiting factor.

I unroll the phase on my reflex port, which is tuned to 29Hz. On a recent i5 processor it starts to use a lot of processor at 96kHz sample rate, so I end up downsampling any very high res stuff to that.

Note that MC has the facility to automatically load convolvers that match the sample rate you're playing, so it can change on the fly from 44.1 to 96 etc
Logged
Pages: [1]   Go Up
« previous next »