It gets plumbed in as if you’d added an effect in a Combinator device. And they’re like Combinators in other ways, too — there’s a programmer window (closed by default), which you can use to do all the usual parameter mapping and external control assignment stuff.
Secondly, Audio Track devices carry an all‑important pop‑up menu, for choosing the type of time‑stretch algorithm the track uses should you play back your track at a different tempo than that at which it was recorded. Reason 6’s real‑time time‑stretch gives excellent results; this just optimises the outcome. ‘All‑round’ is the default algorithm, but ‘Melody’ or ‘Vocal’ can give smoother results on monophonic tracks.
Finally, there are times when you’ll want to create a Mix device manually, which is an option when you right‑click an empty part of the rack. One such situation is when you’re using more than just the main stereo outputs from an instrument like NNXT or Kong. The additional outputs will need their own Mix device (or devices) in order to become part of your mix. So right‑click an empty part of the rack or instrument and choose Other > Mix Channel from the pop‑up menu. The new Mix channel appears. Then, on the rear of the rack, manually drag cables from the additional output to the Mix Channel’s Input.
Back in the days of Reason 5 and before, mix automation — of faders, pans, EQs and the rest — was achieved by recording automation data for a Remix 14:2 mixer, into a sequencer track specially created for it. In Reason 6, however, you can’t create a track for the mixer. Instead you record mix automation data into individual tracks for Audio Track and Mix devices. The process differs a little depending on which it is.
Recording mix automation for an audio track couldn’t be easier. Make sure its parameter automation record‑enable button is on in the sequencer. (You’ll probably want to deselect the main record‑enable button, especially if you’ve already done all your recording on this track.) Then just hit record, and make the knob and fader movements. They appear in the sequencer track on new lanes.
Sadly it’s not quite the same for instruments using Mix devices. The difference arises because while instruments get their own sequencer tracks by default, their Mix devices don’t. You can create them manually, but a super‑quick shortcut is to just Alt‑click the mixer channel parameter — the fader, knob or button — you want to automate. You can also right‑click a control and choose ‘Edit Automation’. In both cases, the outcome is the same; a new sequencer track is created for the Mix device, and then you can just hit the main record button and start recording automation.