If you would like to connect the Sonica DAC to a computer and use it as the computer's sound output device, a software driver may be required.
For Windows 7, 8 and 10: software driver download link (version 3.34_build 23, released on 9/26/2016).
Please unzip the downloaded package and double-click on the "setup.exe" file, then follow the on-screen instructions to finish this installation. Select the Sonica DAC as your sound output device by setting "Control Panel -> Hardware and Sound -> Sound -> Playback" to "OPPO Sonica DAC USB Audio 2.0 DAC".
For Windows 10 build 1607 or higher: if you receive the following error message when attempting to install the driver posted above, "Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52)", please use this driver (version 3.34.0, released on 2/8/2017) instead: software driver download link.
For Mac computers, no software driver is required. Please set "System Preferences -> Sound -> Output" to "OPPO Sonica DAC USB Audio 2.0 DAC".
For iOS, Android and Chrome OS devices, no software driver is required. Recent Linux systems that support USB Audio Class 2.0 do not require software driver either.