Improvisor 5.15 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This free software was originally created by Robert Keller and Harvey Mudd College. The most frequent installation filename for the software is: Improvisor.exe. We recommend checking the downloaded files with any free antivirus. The program relates to Multimedia Tools. The most popular versions of the program are 5.1 and 1.2.
From the developer:
Forum for Impro-Visor: Jazz Improvisation Advisor, free software for musicians, used to create improvised solos, tunes, transcriptions, or bass lines in the form of lead sheets (chord symbols with melody). Runs on Windows, MacOSX, Linux. Here are example of a solo, tutorial, FAQ.
You may want to check out more software, such as Resolume Avenue, Impro-Visor or AthTek DigiBand, which might be similar to Improvisor.
Music Production