As with most of the options suggested in this thread, no pricing and no explicit definition of whether it can be used on videos and no clear definition that I can save output of a specific length.
I get the impression that most of the music software companies are run by people who are very musically/engineering oriented, but not very connected to the business side of things.
I shouldn't have to send an email to a company saying "how do I buy this?"
Without any obvious product or service for sale, it's not discernible from a hobby project.
Boomy's EULA [0] is a fairly easy read that covers the business side of things.
> In consideration of free use of Boomy, any arrangement, sound recording, composition, and/or musical work accessed through the use of the Boomy platform, shall be the property of Boomy Corporation as a work-made-for-hire.
> The user may not edit, remix, or create derivative works of the song outside of the Boomy application without purchasing ownership.
> The user may not distribute the song to streaming services without purchasing ownership.
> The user is permitted to purchase the ownership from Boomy for a fee outlined in the Library section of the Boomy app.