Sites which deal with tuning systems (historical and modern), just intonation, and theories of tuning, temperament, and harmelodics. In Baroque times the primary musical "experiments" were not really in melody, rhythm, or harmony, but in instrument building and tuning systems. Likewise, today the things which separate ambient music artists such as Tricky from experimental artists such as the Deep Listening Band or Harry Partch are in the depth to which experimental artists test new tuning systems.