This should be a remarkably simple program, however I've been having some difficulty doing it myself, and even more difficulty finding previously constructed versions of this program online.
Listen to a microphone, detect bass notes
Average out, say, 60 samples of beats, determine BPM
Using the "current BPM" variable, output a trigger. (in this case, turning on an LED)
I feel like this shouldn't be too hard, but I've been having some troubles. Perhaps someone out there who has gone through the trouble already can save me some trouble and help me out. Any links, ideas, or suggestions would be immensely helpful - thank you!