according to their marketing, the M8A with one ES9028Q2M and a XMOS XU208 inside, is, as per their description, absolute DSD512/768khz-capable:
they say its primarily „solved“ by their custom-made/specialized XMOS XU208-firmware..
so if someone gets a hand on this firmware, rewrite it a little bit, everybody with a XMOS XU208-USB-bridge could eventually benefit from this and everyone with such a USB-Bridge could get DSD512/768khz..(with an ES9028Q2M).
but i guess we have to wait for that/its just only an idea 😉
DAC:ES9028Q2M DAC chip
Output: RCA analog output
Dynamic range: 125dB
THD + N: <0.0003%
USB: DSD: 2.8224/5.6448/11.2896/22.5792 MHz
USB: PCM: 44.1/48/88.2/96/176.4/192/352.8/384/705.6/768 KHz
„M8A as upgrade version of M8Hardware upgrade:Using the 2nd gerneration of XMOS USB audio solution XCore200 Xu208.DAC chip using ES9028Q2M.Upgrade for sampling rate:upgrade from 384kHz DSD128 to 768kHz DSD512.Driver is exclusively customized and support native DSD,which is very advanced in audio range.“