Test and explore sound frequencies with a free online tone generator built for musicians, audio professionals, and everyday equipment checks. Generate tones from 20 Hz to 20 kHz using sine, square, sawtooth, or triangle waveforms. Switch between stereo, left, and right channels, use convenient frequency presets, or run a 15-second sweep to check speakers, headphones, subwoofers, room ... https://aitoolspros.com/tools/audio/tone-generator/