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More => Old Versions => JRiver Media Center 27 for Mac => Topic started by: dctom on December 03, 2020, 05:24:07 am

Title: MC 27 upsampling problem
Post by: dctom 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

Title: Re: MC 27 upsampling problem
Post by: Manfred 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.

Title: Re: MC 27 upsampling problem
Post by: Awesome Donkey 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?

Title: Re: MC 27 upsampling problem
Post by: bob on January 04, 2021, 10:18:06 pm

I think there might be a bug here that Matt found recently.

Title: Re: MC 27 upsampling problem
Post by: Awesome Donkey on January 05, 2021, 01:43:22 am

Indeed, it is likely the DoP issue.

Title: Re: MC 27 upsampling problem
Post by: bob on January 05, 2021, 08:46:02 am

Verified the problem and the fix. Will upload a new build today.