It is no secret that digital audio transmitted via USB is not perfect. USB was never intended for high performance audio, but eventually overtook S/PDIF as the most common connection method. Virtually all digital sources components like streamers, file players, and servers have USB outputs, and no DAC manufacturer would be taken seriously in 2016 without a high quality USB input. USB has several key advantages over S/PDIF. First, it allows the DAC to acted as the master clock, which reduces jitter and improves timing accuracy. Secondly, and probably of more interest to the average audiophile, it allows for decoding of any format, and any resolution. Everything from Redbook CD and 24 bit PCM to DSD256. As to be expected in the audiophile market, products related to improving the sound of USB surfaced several years ago, and it continues to be a growing segment. Audiophile grade
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