Audio & Music

Estimate audio file size for WAV/AIFF (uncompressed) and MP3/AAC/OGG (compressed). Enter sample rate, bit depth, channels, and duration to get file size in MB.

Find the notes in any musical chord: major, minor, diminished, augmented, 7th, 9th, and more. Select root note and chord quality to see intervals and all enharmonic spellings.

Convert between note names (C4, A4, Bb3), MIDI note numbers, and frequencies in Hz. Supports A440 and A432 tuning. Shows octave, cents deviation, and wavelength.

Tune any instrument using your browser microphone. Detects pitch via autocorrelation, displays the nearest note name and cents deviation. Nothing is uploaded.

Free online metronome with adjustable BPM, time signatures, and subdivisions. Start/stop with a click. Runs in your browser using Web Audio API, no install required.

Generate pure tones at any frequency from 20 Hz to 20,000 Hz. Choose sine, square, sawtooth, or triangle waveforms. Set frequency by note or enter Hz directly. Runs in your browser.

Calculate ported subwoofer box port length from enclosure volume, tuning frequency, and port diameter. Also checks box volume and port velocity recommendations.

Tap the button or press Space to measure BPM in real time. Displays rolling average, rejects outliers, and shows milliseconds per beat and musical note values.