Jriver provides direct hardware support for the 2-channel Amanero USB adaptor used in the Ultimate Preamplifier 2/+ so some setup in Jriver is necessary to take full advantage of the Ultimate-Preamplifier. Here is the setup I used in Jriver version 27. Earlier versions of Jriver will be very similar.
Step 1. Make sure you have installed the drivers for the Amanero device on your PC and make sure your PC is connected to the USB audio 2-Channel input on the back of the preamp. Select "Combo384 ASIO" from the Audio Device menu as below:-
Audio Device.png
Step 2. Set Device settings as follows
Combo384 ASIO.png
Step 3. Since the preamp can only handle a maximum of 192 kHz sample rate you can down convert the higher formats using integer fraction sampling rates as below:-
DSP Studio.png
Step 4. Both the 2-ch Preamp and 2-ch Direct DAC modes on the Preamp use hardware DSD (not DoP) so set this as follows:-
Bitstreaming.png
Note that the Preamp has 6 dB lower gain when playing back DSD files so bear this in mind before comparing Preamp and Direct DAC modes ;)
Example of DSD 64 file through the Preamp
LCD_DSD.png
Example of DSD 64 file Direct to the DAC
LCD_DSD_Direct.png
Example of DSD 128 file through the Preamp
LCD_DSD128_Preamp.png
A maximum of DSD256 can be handle in both Preamp and Direct DAC modes ;)
LCD_DSD256_Preamp.png