Found it, it's indeed high quality+ramping in absolute mode.Ah, it has something to do with the ramp setting. Every value with "xxms absolute" causes noise.
I normally don't advise to use absolute ramping, it's there because it's how it works in Harmless. Relative produces sharper transients, but in this case I admit it sounds nicer in absolute mode.
Until the next release you'll have to render it with HQ off (it doesn't make any audible difference anyway).



