Jim,

Like you, I'm not a midi expert but there are some around here. Hopefully they will see the post.

In the meantime.... with only the knowledge of a novice to call on, it sounds like BIAB and Reaper are sending on a particular channel and the harmoniser is not set to receive that channel. (At least that's what I'd try.) I suspect that your keyboard you mention is set to send on all channels.

I'm assuming you have BIAB 2016 and the track you want sent is Melody....

If you look under the "Options | Preferences" and then select "Channels", you'll see that the Melody track uses channel 4. Try changing this to 1 and see if it makes a difference. (Reset it back to 4 if it doesn't do anything. Also, I'm not sure if BIAB needs a restart after changing channels so that the change can take effect. It might pay to do this.)

Regards,
Noel

MY SONGS...
Audiophile BIAB 2025