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1. Start HQ player:
   
   
   
2. Click in the top left corner Menu and select HQPlayerDesktop3 - Preferences menu:
   
   
   
3. First set Backend to CoreAudio 
   Then select Merging+NADAC as Device :
   It is recommended to keep the Buffer size to Default.
   
   
   
   
   
4. Configure PCM Defaults for PCM playback without any down or up-sampling:
   Filter : None - Dither : None - Sample Rate /Limit : 384000
   
   
   
5. You can now play PCM files:
   
   
   
6. Configure SDM Defaults for DSD playback without any down or up-sampling:
   Oversampling : poly-sync - Modulator : ASDM5 - Bit Rate /Limit : 11289600
   
   
   
   

7. Select SDM(DSD), and you can now play a DSD file.
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   Note: DSD through DOP on Mac computer is limited to DSD128, however MERGING+NADAC is DSD256 capable.
   

8. Disable App Nap
   App Nap can negatively affect HQPlayer

   1. Go to your Applications folder.
   2. Select the HQPlayer application
   3. Right-click or control+click the HQPlayer application
   4. Choose Get Info
   5. In the HQPlayer Info window, under General, you will see an option to prevent App Nap, enable this checkbox.

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