measured the Weiss Helios with my Audio Precision SYS2722, repeating some of the tests with the higher resolution APx555. All the measurements were performed with the Helios’s DSP bypassed. Apple’s USB Prober utility identified the Helios as “Helios” from “Weiss_Engineering_Ltd.” with the serial number string “0.0.1.” The USB port operated in the optimal isochronous asynchronous mode, and Apple’s AudioMIDI utility revealed that the Helios accepted 32-bit integer data sampled at all rates from 32kHz to 384kHz. The AES3 and coaxial
