In a letter dated 26 March 2007, Activision requested that Piegdon 'immediately cease any and all use of the 'Piano Hero' name in connection with the distribution and promotion of video game and agree not to use such in the future'. An open source fork for Linux called Linthesia also exists, which is used as a base of other forks to fix compilation issues on recent Linux systems. The program was originally for Windows-only, but after a donation drive in early 2007, it was ported to Mac OS X. Hosted as an open-source project on sourceforge, it was released under the MIT license.
Synthesia was started around 2006 by Nicholas Piegdon, and was originally named 'Piano Hero'. 1.2 Continued development as closed-source project.
