Generate accurate reference frequencies with a free online audio frequency generator. Set frequencies from 20 Hz to 20 kHz, choose a waveform and control the output channel for stereo or individual-ear testing. Preset tones make common audio checks faster, while the logarithmic sweep helps explore speaker, headphone and room response. Useful for musicians, audio engineers, editors and... https://aitoolspros.com/tools/audio/tone-generator/