Double click on a clip to see the transient slice markers that have been detected and you can pick them up to time stretch and correct audio without altering the length of the clip. The second major new feature is the automatic slicing of all recorded audio – essentially ReCycle inside Reason, but fully automatic. An obvious use would be to route outputs from the hardware back into Reason, so the instrument is essentially incorporated into the project.
First up there’s a new device that you can load into the Rack called External MIDI Instrument which lets you trigger hardware like drum machines or synths directly from Reason’s sequencer.