I found a free 768kHz PCM file here:
Does this mean I’m now playing native 768kHz
The 1.41 and both low and high gain can drive my DT 880 600Ohm, no issues through the unbalanced 3.5mm TSR connection. I would say low gain is normal listening volume at max volume, I would like to use the higher gain, but then I will not set volume more than 90%. Low gain has lower noise and I think when I go 4.4mm TSSSR balanced connection, the low gain will be enough. No clipping or anything else.
I think you should consider one more UX improvement:
- The turquise color only visible when you change volume (and that is not something you do constantly). Your ears will be your UX feedback and the visual is an extra.
- Put the playback format as always visible, because that’s something you care about if you are using Khadas Tone2 Pro (otherwise you could buy cheap junk elsewhere). The format is visible maybe 1s, but it takes the device a few seconds to visualize the format, so you need to time that to ca 5s after a trach changes. Always showing format would improve my life a lot.