You write the melody of a song - old, new or your own.
Then tonica pop will arrange for you:
tonica pop comes with more styles.
You can also compose a piece of music without melody voice solely basing on the harmonization. This is relevant for Pop and Jazz as here, you typically start with a lead sheet and compose or improvise the melody later.
Try it out with the free 15-day trial version!
All score displays on this site were edited with capella. The unchanged arrangements were done by tonica pop.