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1. Start ROON player
   
   
2. Click in the top left corner Menu and select Settings menu.
   
   
   
3. Go to the Audio Menu, then select MERGING+NADAC and click on Enable.
   
   
   
4. In the General tab :
   Set the Volume Control Mode to Use Device Controls
   Set the Resync delay to 1s
   
   
   

5. Now in the Playback tab :
   Enable the Use Exclusive Mode option.
   Set the DSD Playback Strategy to DSD over PCM v1.0 (DoP)
   Set the Max DSD Sample Rate to Up to DSD256.
   Channel Layout should be set according to your NADAC model; 2.0 if you have a 2 Channels NADAC or 7.1 if you have a 8 Channels NADAC.
   Configure the Multichannel Mixing Strategy according to your needs  (see this page for details)
   Click on Save Settings.
   
   
   
   

6. Enter a Zone Name for the MERGING+NADAC Device 
   
   
   

7. You can now play music on your MERGING+NADAC.
   If you have several Zones defined, make sure you have selected the NADAC one.
   
   

    

8. Disable App Nap for Roon
   App Nap can negatively affect Roon.

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

    

   Note
   title Note on Volume Leveling and Crossfade options
   Both Crossfade and Volume Leveling options in the Zone Settings page enables a sampling rate conversion for DSD files, which will prevent NADAC to run in DSD native mode, the conversion will force the device to run in DXD mode. Disable the Volume Leveling and leave the Crossfade option to 0 seconds if you don't want this conversion.

   
   

   Note
   title DSP ENGINE
   Please use Roon DSP Engine features with caution, it can be very demanding resources wise, and therefore can cause drops for multichannels / high sampling rate playback ! See this page for details

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