For musicians
The guitar tuner analyses the sound from your microphone in real time and shows the nearest note and how many cents sharp or flat you are. Choose your instrument and tuning, or use chromatic mode to tune any note. Tuning in a quiet room and plucking one string at a time gives the steadiest reading. The metronome keeps time with adjustable tempo, time signature and accents; learning a new piece slowly and cleanly before raising the tempo step by step is an effective way to practise.
Tone generator and converter
The tone generator plays pure tones anywhere from 20 Hz to 20 kHz, sweeps across a frequency range, produces noise and creates binaural beats. Use it to test speakers and headphones or to explore your hearing range, but keep the volume low, especially at high frequencies. The MP4 to MP3 converter extracts the audio from MP4, MOV, WEBM and other videos as MP3, M4A or WAV. It runs ffmpeg compiled to WebAssembly in your browser, so the video never leaves your device.