Instruction manual

DAC2 DX Instruction Manual Rev A Page 19
USB - Computer Input
The USB input supports 44.1, 48, 88.2, 96, 176.4, and 192 kHz sample rates at word lengths up to
24-bits. The USB also accepts DSD. Mac operating systems support all sample rates and formats
without drivers. Windows operating systems require drivers for DSD and PCM sample rates above
96 kHz.
The USB input accepts a male ‘B-type’ male USB connector. An ‘A-B type’ USB cable is provided
with the DAC2. The USB cable connects the DAC2 directly to a standard 'A-type' USB port on the
host computer.
USB Audio Modes
The USB input can be toggled between two different modes:
 USB AUDIO 1.1 - PCM sample rates up to 96 kHz
 USB AUDIO 2.0 - PCM sample rates up to 192 kHz, and DSD64 in DoP 1.1 format.
USB 1 ports only support the USB Audio 1.1 mode. USB 2 and USB 3 ports support both modes.
USB Mode Indication
The 2X or 4X lights will flash once when the USB input is selected. This flash indicates the USB
mode:
 The 2X light will flash if the DAC2 is set to USB AUDIO 1.1 mode.
 The 4X light will flash if the DAC2 is set to USB AUDIO 2.0 mode.
Changing the USB Mode
The USB MODE can be changed using the front panel or the remote control.
To change the USB MODE from the front panel:
1. Select the USB input
2. Press and hold the lower INPUT button for 10 seconds
3. When the mode changes, the 2X or 4X light will flash once to indicate the new mode
To change the USB MODE from the remote control:
1. Press and hold the USB button for 10 seconds
2. When the mode changes, the 2X or 4X light will flash once to indicate the new mode
USB AUDIO 1.1 MODE (Factory Default)
The USB AUDIO 1.1 MODE provides a plug-and-play solution that works with many different
operating systems. In most cases, the DAC2 can begin streaming high resolution 24-bit/96 kHz
audio bit-transparently within seconds after being plugged into a computer for the first time. Little
or no software or hardware configuration is required in this mode.