Calibrate and troubleshoot audio equipment with a free online sound generator that produces accurate frequencies in the audible range. Use a 1 kHz reference tone for basic audio checks, 440 Hz for musical tuning, or other frequencies for speaker and headphone testing. Choose different waveforms, control output volume, select individual channels, and use the sweep mode to explore the f... https://aitoolspros.com/tools/audio/tone-generator/