Map bpm to controller and record midi

So I’ve got the bpm mapped to a midi controller but no values are getting recorded as I tweak it during playback, not in individual fx columns or the master or sends fx.

I want to slow and speed the bpm thought the song improvisationally, instead of drawing automation curves.

I’m using a Korg nanocontrol2 and renoise 3.1.0.

Sounds like fun, right?