I never had any problems streaming 24/96Khz data to my Benchmark DAC1USB using the USB1.1 protocol. USB 2.0 is supposed to go up to 192KHz with the right drivers and hardware.
USB should do 24 bit at 96khz, but it is not very stable.
Benchmark and Wavelength are both using USB at 24/96 with good success. In running high-rez flies into the Benchmark I have not had a a problem or instability ever.
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