More > JRiver Media Center 21 for Linux

HD Audio Support

(1/4) > >>

danhardison:
Hello,
I have an iFi Micro iDSD dac that is supposed to be able to play all high def formats known to man. (http://ifi-audio.com/portfolio-view/micro-idsd/)
I have downloaded some sample high def tracks and I am getting the attached down-sampling notification in the Audio Path window.
I don't know if this is a limitation of my pc, Media Center or the DAC. Or if there is some configuration I should change.
I have attached screenshots of the file details, and the resultant audio path output.
Has anyone been down this path? Any advice appreciated.
Dan

blgentry:
By default, MC converts DSD to PCM and then uses the DSP Studio settings to decide exactly what rates of PCM get sent to the DAC itself.

Try one change at a time.

First, set up bitstreaming for DSD.  This will make MC send the actual DSD bitstream to your DAC instead of converting it to PCM.  Note that you lose the ability to control any processing on DSD tracks when you do this. No volume, no EQ, ... nothing in DSP Studio will work in DSD because MC is going to send it directly to your DAC.

Tools > Options > Audio > Settings > Bitstreaming > DSD

After you get that working successfully, you should examine the Output Format settings.  Player > DSP Studio > Output Format

Look at the matrix in the lower left/center.  It maps input rates to output rates.  Configure this to send what your DAC can handle.

Good luck.

Brian.

danhardison:
Thanks.

I did this, and I am still getting the same results on that 11.2Mhz track. Interestingly, it doesn't matter if I set the sample rate option in DSP Studio to "Set all to no change", next time I look it has reverted back to setting everything above 192,000Hz to 176,400. Is this because it has detected that as a limitation in my DAC?

And more interestingly, when I play another track that is 2.8Mhz, it plays it with no changes, even though that is above 192,000..

See attached.

blgentry:
That 11.2 MHz file is quad rate DSD.  I *thought* that would just bitstream normally.  But I don't have any experience with DSD DACs, so I'm not sure.  My DAC only supports PCM, so I convert from DSD to PCM and go from there.

Obviously single rate DSD is working with bitstreaming (2.8 MHz).  I'm not sure where the problem lies.  I don't use MC on Linux, so I'm not super familiar with audio setup with MC for Linux.

Maybe Bob or Mwilliems or one of the other Linux "heavies" will weigh in.

Brian.

danhardison:
No worries. Thanks for replying. I will keep reading.
Dan

Navigation

[0] Message Index

[#] Next page