Do you live in the now or keep a foot back in the past? Better yet, what should an API provider do?
At the end of July Last.fm (our Last.fm API profile) shut off some old API calls, to the disappointment of some mashup users and developers. The company had some good reasons, but it raises the question about what developers should expect, especially from free APIs.
Peachnote is quite an innovative approach to music analysis. Developed by Vladimir Viro, a renaissance man who bridges the worlds of classical music and advanced mathematics, the Peachnote API provides the ability to search a large collection of public compositions by melody or sequence of chords.