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Author Topic: MC 27 upsampling problem  (Read 1100 times)

dctom

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MC 27 upsampling problem
« on: December 03, 2020, 05:24:07 am »
Have had to reinstall MC 27, it has been working fine - however now..

When upsampling in DSP studio and  select 2xDSD or 4xDSD for instance, in the playback window I get-

 resample to 705 khz with SSRC , 
 encode as DSD in Dop format

this produces a strange distorted sound.

my DAC is 4 x DSD capable btw

can amyone help please
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Manfred

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Re: MC 27 upsampling problem
« Reply #1 on: December 03, 2020, 10:25:05 am »
DSD over DoP is the only possibility to play DSD on the macOS platform. Exception is if the DAC vendor provide special drivers. You must enable this in Tools->options->audio->Device (DSD bitstream in DOP format) and also enable audio->bitstream->DSD

To package DSD128 in PCM, you need on the macOS platform 384 kHz PCM sampling rate. For DSD256 it would already be 768 kHz.

So your DAC must provide a pcm sample frequency of 768 kHz to play DSD256 on the macOS platform.
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Awesome Donkey

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Re: MC 27 upsampling problem
« Reply #2 on: December 28, 2020, 03:31:46 pm »
Shot in the dark, but have you tried disabling (or enabling it if it's disabled) integer mode?
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bob

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Re: MC 27 upsampling problem
« Reply #3 on: January 04, 2021, 10:18:06 pm »
I think there might be a bug here that Matt found recently.
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Awesome Donkey

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Re: MC 27 upsampling problem
« Reply #4 on: January 05, 2021, 01:43:22 am »
Indeed, it is likely the DoP issue.
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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

bob

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Re: MC 27 upsampling problem
« Reply #5 on: January 05, 2021, 08:46:02 am »
Verified the problem and the fix. Will upload a new build today.
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