BUC-1

Modern DACs have asynchronous USB inputs to connect your computer for playing music files. This results in the bitstream being re-clocked to the outboard DAC's own clock, which is much more accurate than a computer's digital clock. However, older DACs, even expensive ones, don't have asynchronous USB inputs. The Bryston BUC-1 solves this by having a USB input for connection to your computer, and an accurately re-clocked digital output that can be connected to your old, and perhaps very expensive, DAC, giving you the essential asynchronous input.