Feilakas

OnePlus 3T Stock OxygenOS 3.5.4 (Root+XPosed), Marshmallow 6.0.1 Through earphones it works fine with Poweramp 703 at 192Khz

I'd like to add that OnePlus One's Marshmallow CyanogenMod-based builds also support it, I've personally used it with ResurectionRemix ROMs up to 192 and I've read from others that "stock" CM13 nightlies also support it just fine. On the other hand, I've read that SultanXDA's CAF-based builds for some reason didn't support it at least up 'till now, not sure whether that has changed or will change.