Hi natcheztoo.
BIAB can do what you want.
Firstly, the image below shows the standard view of BIAB. To switch between standard and full-screen views, press CTRL+T, or use the "Window" menu.
![[Linked Image - Only viewable when logged in]](https://www.pgmusic.com/forums/ubbthreads.php?ubb=download&Number=29997&filename=harmony for midi melody.jpg)
When in standard view...
1) Click on the Harmony button (#1 on the image).
2) Select Melody Harmony (#2).
3) Choose from the list of available harmonies (#3) – I suggest "Electric Piano in 3rds" as a starting place.
4) If you want to return to the melody without harmony, select "No harmony" (#4).
Also, if you want to write the harmony to the melody line, select "Write harmony to melody track". Be warned, though, that this will overwrite your melody with a harmonised melody. Before you try this feature, I recommend saving the file with a slightly different name so that you can return to the original file if you need to.
Regards,
--Noel
★ my latest song: My Home (vocals by Synth V’s vocaloids, Kevin and Solaria)