Audiophilepure

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“A big factor in a DAC’s sound is how well the USB interface is implemented. Some otherwise superb units are compromised by less-than-stellar performance when driven by a USB input. A good way to isolate the USB interface’s contribution to the DAC’s sound is to insert the Berkeley Audio Design Alpha USB converter in the digital signal path. The $1895 Alpha USB takes in USB from the source, reclocks it, isolates the output from noise at the input, and reformats the signal into AES/EBU or SPDIF (the latter on a BNC jack). The Alpha USB is the state of the art in such devices; I’ve heard it absolutely transform the sound quality of some DACs, turning mediocre performance into excellence. Significantly, with the Yggy the Alpha USB rendered the least improvement in sound quality of any DAC I’ve done this experiment on. In other words, the Yggy’s USB input is extremely well designed.”

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