7 tools
Fixed Frequency
Reference Hz pages, Solfeggio hub, and bass test presets.
440 Hz Tone Standard concert pitch reference tone at A4 (440 Hz). Fixed Fréquence 432 Hz Tone Alternative tuning reference at 432 Hz — compare and listen instantly. Fixed Fréquence 528 Hz Tone Solfeggio-associated reference tone at 528 Hz. Fixed Fréquence 1000 Hz Test Tone Industry-standard 1 kHz reference for calibration and testing. Fixed Fréquence 60 Hz Hum Generator North American power-line frequency reference at 60 Hz. Fixed Fréquence Solfeggio Frequencies Curated Solfeggio reference tones — listen and compare. Fixed Fréquence Bass Test Tones Low-frequency test presets for subwoofers and full-range systems. Fixed Fréquence