Web Tools — Free Audio Tools

Measurement & signals

Shows the sound coming into your device microphone as a 31-band (ISO 266) spectrum in real time.

Pink and white noise, sine, square and triangle waves, hum, buzz and hiss for checking speakers and signal chains.

Train your ear to hear which frequency band was boosted or cut in pink noise — with your own music too.

Compare reverb, delay, chorus and more, plus compressor, gate and ducking, with the effect on and off.

Convert delay time, distance, frequency and phase, and check speaker alignment.

Frequency, wavelength and period, notes, room modes and reverb time (RT60).

Ohm's law, power, impedance, dB-to-power conversion and cable voltage drop.

Tap tempo, note lengths per BPM, speed and pitch, and loop BPM.

Countdown, stopwatch, start/end times, work/rest cycles such as 45 min mixing plus a 5 min ear break, and rehearsal-room booking alerts in one place.

A steady metronome with 20–300 BPM, tap tempo, time signatures and subdivisions, a speed trainer and a practice timer.

Multiple-choice questions from 14 chapters of the standard textbook, plus calculation problems. (Korean only.)