Solfeggio Player
Web app that generates the solfeggio frequencies in the browser — pure Web Audio API, no samples.
A browser-based tone generator for the solfeggio frequencies — the set of tones rooted in a medieval hymn to John the Baptist and rediscovered in the 1970s. Pick a frequency (174 Hz through 963 Hz), shift it by octave, and change the waveform; every tone is synthesized live through the Web Audio API, no audio samples anywhere. A small, self-contained tool built for its own sake.