Create test tones online with a free sound generator offering accurate frequency control from 20 Hz to 20 kHz. Choose sine, square, sawtooth or triangle waveforms and route the output to both ears, left or right. Use the tool for speaker and headphone testing, musical reference tones, audio troubleshooting, room acoustics and basic frequency checks directly from a web browser. https://aitoolspros.com/tools/audio/tone-generator/