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On the fly upsampling can be a huge CPU hog

73.229.163.4

In Reply to: RE: Very little processing power - describe your 'stream' posted by boogyman on February 05, 2024 at 05:44:22

...which you didn't mention in your original post. You said you were "playing" DSD512, not "upsampling" PCM to DSD.
If you are 'on the fly' upsampling PCM to DSD512, that can require a huge amount of processing power depending on the parameters you choose.
I've played with HQPlayer in the past which does on-the-fly PCM to DSD upsampling during playback. Upsampling to DSD128 from 24/96 PCM presented a moderate load but upsampling to DSD512 brought my 3.6 GHz Intel quad-core i7 to its knees. It ran hot and it struggled with all CPU cores pegged. HQPlayer offers what they call "DSP offload to GPU using NVIDIA CUDA". In other words they can take advantage of a dedicated NVIDIA GPU for even more processing power. Maybe you need a gaming PC ;-)
You could try converting your PCM files to DSD files -before- playback vs on-the-fly PCM to DSD conversion during playback.

Edits: 02/05/24 02/05/24

Follow Ups:

RE: On the fly upsampling can be a huge CPU hog - boogyman 08:46:09 02/05/24 (3)
That's what I thought.

I'll look to see what software I can use to convert PCM .WAV to DSD512.

Why I would do that is because I like the sound.

Thanks for letting me know about your experience.
- RE: what software I can use to convert PCM .WAV to DSD512 - ltman 20:28:51 02/12/24 (1)
  JRiver?
  - RE: what software I can use to convert PCM .WAV to DSD512 - boogyman 04:56:04 02/13/24 (0)
    I'll look into that, thanks.
- RE: On the fly upsampling can be a huge CPU hog - AbeCollins 12:27:11 02/05/24 (0)
  I played with HQPlayer for a couple months and it was fun trying various sigma-delta modulation and on the fly upsampling. Part of the fun was seeing how to best peg the CPU cores and how to nearly crash the computer ;-)
  
  As for sound quality, my personal preference is for high quality PCM.
  
  Good luck!

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