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More => Old Versions => JRiver Media Center 29 for Windows => Topic started by: Manfred on June 01, 2022, 05:48:04 am

Title: DSD Problems (from 29.0.55 thread) [Solved]
Post by: Manfred on June 01, 2022, 05:48:04 am

Quote

Changed: Put the 8x resample done during DSD to PCM conversion in Audio Path.

There seems to be various problems in the Audio Path Display with different DSD formats. I attached it as screenshot but you can also have the .odp file. I tested it with 2(3) different DAC's.

Title: Re: DSD Problems (from 29.0.55 thread)
Post by: Matt on June 01, 2022, 07:25:55 am

Thanks for the report.

I'm not sure I'm able to reproduce any strange behavior.  I'm playing DSD as PCM and the Audio Path seems correct.

Could you describe one simple test we could run?  Thanks.

Title: Re: DSD Problems (from 29.0.55 thread)
Post by: Manfred on June 01, 2022, 08:32:42 am

The simplest one is to play a DSD 128 file.
If played native (bitstreaming every think is fine) see screenshot.

If playing through DoP sample rate has a mismatch. ADI-2 DAC has DoP recognition and for DSD128 the sample rate should be 352.8 kHz but ADI-2 DAC shows 705.6 KHz. AudioPath shows 5.6 MHz.

Other example
If playing DSD 512 it seems that MC  does DSD512->pcm->DSD256. Is that correct? Audiopath is saying it plays DSD 256.
If yes: Better should be: DSD 512 is larger as the value defined in the bit streaming option (up to DSD256)->convert DSD 512 to the sample rate specified in DSP output (e.g. > 705kHz->192 kHz). But that should be defined by you and the MC community how to handle it.
 

Title: Re: DSD Problems (from 29.0.55 thread)
Post by: Matt on June 01, 2022, 08:45:37 am

Here's what I see playing DoP.  We report the correct rates.

Title: Re: DSD Problems (from 29.0.55 thread)
Post by: Manfred on June 01, 2022, 09:39:46 am

Interesting - I will look at it why your DoP is different to mine.

Title: Re: DSD Problems (from 29.0.55 thread)
Post by: Manfred on June 01, 2022, 09:43:54 am

Got now the same for DSD 128 using DoP. Also DSD 256 using DoP is ok. My fault. Very Sorry about it! I enabled DoP in the Device Driver but disabled bitstreaming.

Title: Re: DSD Problems (from 29.0.55 thread)
Post by: Matt on June 01, 2022, 09:49:00 am

Glad it's working.  Thanks.

Title: Re: DSD Problems (from 29.0.55 thread) [Solved]
Post by: Manfred on June 01, 2022, 10:04:11 am

The other one is using the rme HDSPe card which is only capable of pcm:

It seems that MC does convert DSD to pcm 176,4 kHz, what should be the correct value.

But the output message seems to be wrong.

Title: Re: DSD Problems (from 29.0.55 thread) [Solved]
Post by: Manfred on June 01, 2022, 10:14:35 am

For DSD 128 the same:

Title: Re: DSD Problems (from 29.0.55 thread) [Solved]
Post by: Manfred on June 01, 2022, 10:20:36 am

DSD 256 is converted to 192 kHz.The output message is not correct:

Title: Re: DSD Problems (from 29.0.55 thread) [Solved]
Post by: dtc on June 01, 2022, 10:23:47 am

It looks like the Output sample rate is off by a factor of 8 in these cases of conversion to PCM.

Title: Re: DSD Problems (from 29.0.55 thread) [Solved]
Post by: Matt on June 01, 2022, 10:26:56 am

Thanks for the help.

Next build:
Fixed: During DSD to PCM conversion, the output sample rate reported by Audio Path could be off by 8x.

Title: Re: DSD Problems (from 29.0.55 thread) [Solved]
Post by: Manfred on June 01, 2022, 11:27:16 am

If I use DLNA to the Devialet and I enable Bitstream in the Advanced settings for the DLNA devices then the DAC must be capable to play all DSD formats. You can not set it up: DSD up to DSD64?

Also playing through DLNA fast forward has a very long lag.