Use this free online audio tone generator to produce accurate frequencies between 20 Hz and 20 kHz. Choose a waveform, adjust volume, and select stereo, left-ear, or right-ear playback. The tool is useful for musical reference tones, instrument tuning, speaker and headphone testing, room acoustics, audio troubleshooting, and hearing self-checks when used at safe listening levels. https://aitoolspros.com/tools/audio/tone-generator/