Faitoq
New Head-Fier
The May has full laser diode galvanic isolation for the USB input, meaning the USB host is not actually directly electrically connected to the DAC itself and noise cannot pass through, so it's effectively immune to USB source changes.
In terms of HQPlayer settings I've got a config file + guide here that should be a good start. The new HQP 5 has a different settings layout but the settings themselves are the same.
Would recommend trying both Sinc-Mx and Sinc-L as those are the two technically best filters but some have a preference for one over the other
https://drive.google.com/drive/u/2/folders/106xSVmY-4ct2IZMJX4jY81vZlkaNitU0
When you have the Holo May, will you get the same noise and jitter performance when using its USB input vs its other inputs via any DDC/Streamer?