Generate precise audio frequencies with this free browser-based tone generator for tuning, testing, and calibration tasks. Choose any frequency from 20 Hz to 20 kHz, select a waveform, adjust playback volume, and direct sound to both ears or one channel. Presets such as 440 Hz and 1 kHz make common tests quick, while the 15-second sweep helps examine speakers, headphones, and room aco... https://aitoolspros.com/tools/audio/tone-generator/