OK, got it. I have been test flying my new 5" build with various settings including Dshot from 300 to 1200 and I can’t tell a difference. But granted I’m no Racer just doing it experimentally. I plan on playing around with some newer BHeli_32 setting also but again I don’t expect to see a practical difference, just testing new tech for fun!
Sine modulation and variable PWM frequency. By new I mean a few months old. A 4in1 I just built into my 5" supports these with a firmware flash update. I haven’t tried it yet because there is a problem with BLHeli passthru on the Matek H743-Mini I’m using. I have to flash back to Betaflight to make these changes which is a pain.