In summary, the Khadas Tone Board is an amazing external USB hi-fidelity sound card that offers excellent performance and compatibility which will take customers' listening experiences to a whole new level. This powerful DAC was made by integrating the advanced XMOS multi-core RISC microcontroller and ESS flagship 32-bit stereo mobile audio DAC ES9038Q2M into a tiny PCB. Next, three independent high-performance OPAs and four low-phase jitter oscillators were added for the best noise reduction. Just as one would expect, each power supply path is powered by an independent, low-noise power supply and the OPA is powered up to ±5.5 V.