DSD256 with problem

I have a doubt, using the Mac with IOS I can use it without a problem until DSD128.
When I try to use DSD256 it works, but it fails.
I use the DAC of the Oppo 205 that goes up to DSD256.
I’m using a Mac mini I5 with 8GB of memory, an exclusive computer for audio.
Is this a problem with the processor or Audirvana?


Tenho o mesmo problema. Você resolveu?


O problema é com o Oppo 205, com outros DACs funciona perfeitamente.


O Audirvana deveria permitir no setup, baixar para DSD 128, como no Roon.
A solução foi desativar o DSD no setup do Audirvana. Reproduz 32/352.8kHz.



Stereo 2.8MHz DSD (DSD64) generates data rates as follows:

2 x 44100 x 64/8 = 705600 bytes per second

705600 x 60/1048576 = 40.375 megabytes (MB) per minute

705600 x 60 x 60/1048576/1024 = 2.3657 gigabytes (GB) per hour

Double this for 5.6MHz DSD (DSD128)
Quadruple this for 11.2MHz DSD (DSD256)

More RAM reduces CPU processing disc/RAM caching interrupts, thus reducing CPU processing = better performance.

RAM bus speed and disc/RAM caching is always going to be a factor in CPU processing overhead… The playback buffer is the key and how this is managed… if the I/O bus of the playback buffer is anemic this would cause playback anomalies… System operation must be unencumbered by disc/RAM caching and the Audirvana engine must be unencumbered by disc/RAM caching, so to maintain data integrity by reducing clocking related jitter due to buffer under-runs for best sound-quality and playback operation… There is a balancing act with the available RAM, bus speed and the bit-depth and sample-rate and length of the file being played, and any DSP being implemented in the player engine/system

May be a signaling issue over your network to the Oppo? Does the Oppo play DSD256 with direct USB?

:notes: :eye: :headphones: :eye: :notes:

Does this information from the Oppo UDP-205 regarding DSD256 make sense?

Yes, Oppo plays DoP DSD256 directly on USB.
The problem is that it has small glitches during music.
With DoP DSD128 works perfectly.