– Does Mercury drum sequencer support Audiobus or inter-app audio?
Yes, Mercury drum sequencer supports Audiobus 3 and inter-app audio.

– Which parameters can be overridden per step?
All per track and per osc parameters, except effect type can be overridden per step.

– Which effect types are available?
A bit rate reducer where the parameter is bit rate, and a delay buffer where the parameter is delay time.

– Can I import samples?
Yes, samples can be imported through AudioShare if you have it installed. In Mercury, press the import samples button in the toolbar to launch AudioShare. Supported sample formats are 16- or 24-bit wav files at 44.1 kHz.