INTERACT FORUM
More => Old Versions => JRiver Media Center 22 for Mac => Topic started by: mikeral on February 01, 2017, 06:50:00 pm
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Trying to bitstream DSF file to Marantz HD-AMP1. Before starting the playback I set the format in MIDI to 352800.0 HZ ch - 32 bit integer. Once I click play in MC format in MIDI changes to 176400.0 Hz 2ch-32 bit integer and all I can hear is some noise and Marantz display shows 176.4K indicating PCM.
Audirvana has no problem streaming that same file from the same computer and Marantz recognizes and displays DSD 2.8M and plays the file properly.
Same problem trying to bitstream from MC to Plenue P1 and IBasso DX80 and again these 2 units work perfectly with Audirvana.
MC version 22.0.54, OS version OS X 10.10.5
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Before starting the playback I set the format in MIDI to 352800.0 HZ ch - 32 bit integer.
Where are you setting that? For bitstreaming, there should be no conversion set.
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Actually, in macOS/OS X for some (perhaps most, if not all) DACs to get DSD/DoP working you have to open the Audio MIDI Setup and set it to the max bit-rate/sample rate available or else it won't work. It's been documented with MC and other apps - some DAC manufacturers recommend doing this step. I don't believe it's for conversion purposes, it's to make sure the system is using the proper bit-rate/sample rate to get DoP working correctly.
Having it not set has caused DSD/DoP issues in the past, that were fixed once it was set. It's very odd indeed.
Examples:
http://schiit.com/guides/dsd-setup
http://blog.moon-audio.com/chord-hugo-how-to-setup/
If I had to wager a guess, it's because macOS/OS X defaults to a lower bit-rate/sample rate system-wide, causing DoP to fail with DSD64 and DSD128 (and likely above) unless the system-wide setting is set to the highest available to allow DoP to function correctly. Mac is one strange beast sometimes.
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Not all DACs apparently. I have a 2010 Mac Mini with MC 21 into an Auralic Vega and it shows DSD 64 on the display when that's what's sent to it via USB or a microRendu. I hadn't paid any attention to Audio Midi setup but just checked and it's set to 24/44. I must have left it set there at some point while trying different settings but in any event, it doesn't seem to make any difference to the VEGA. YMMV.
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As for the issue at hand here, it looks like DSD is being converted PCM indeed. Make sure a) DSD bitstreaming is enabled, and b) Open DSP Studio > Output Format and make sure you have nothing set for Output Encoding.
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As for the issue at hand here, it looks like DSD is being converted PCM indeed. Make sure a) DSD bitstreaming is enabled, and b) Open DSP Studio > Output Format and make sure you have nothing set for Output Encoding.
I did the "a)" part, of course, otherwise I would not be expecting it to bitstream :-)
The "b)" part I have always "OFF", the box have no check mark , but why would that matter anyway? Bitstreaming suppose to bypass DSP engine all together, once MC encounters DSD file it's just suppose to send it to USB port bit by bit, and that is not happening ....