Analogue-sequencer

> Is there a way to pre-listen to the note-value of a step?

Play the note value you intend to enter on a keyboard ? ;-)

> What would
> be nice is if, while in play mode (while the sequencer is not
> running), holding down FUNC while pressing a step key allowed you to
> pre-listen to the actual note of that step...

That might not be too hard...
Something along these lines is already on the final TBI list, though that
depends on some other things.
I'm also working on something rather different for P3 that may move the
goalposts a bit with regards to the final TBI list.

> Also, is there a way to enter notes into the sequencer via MIDI
> controller - one step at a time with auto-advance?

Arpeggio capture mode, with RoNG turned off.
For more details, RTFM.
F for Fabulous ;-)

Best regards,
Colin Fraser
Sequentix Music Systems Ltd
http://www.sequentix.com