Generate accurate audio frequencies with a free online tone generator for music tuning, speaker and headphone testing, room acoustics, subwoofer checks, and audio troubleshooting. Create tones from 20 Hz to 20 kHz with sine, square, sawtooth, or triangle waveforms. Choose stereo, left, or right channel output, use preset frequencies, or run a 15-second logarithmic sweep to test differ... https://aitoolspros.com/tools/audio/tone-generator/