440 Lab is a free, ad-free collection of simple tools for musical tuning, rhythm, pitch, and intonation ear training.

Tuning and reference pitches

Use the tuner to check the pitch of a note with your microphone, or play reference tones to practice matching and tuning by ear. The reference pitch is adjustable, so you are not limited to A440.

Pitch and intonation ear training

Practice hearing small differences in pitch and recognizing whether a note is sharp or flat. The exercises are intended to develop pitch discrimination and a more accurate sense of intonation without requiring perfect pitch.

Metronome and rhythm practice

Use the metronome for a steady beat while practicing, choose from common simple, compound, and odd meters, or tap a tempo to set the BPM by feel.

Simple by design

440 Lab is designed to be a small, straightforward set of music practice tools: open it, choose a tab, and start practicing. Works well on desktop and mobile.

Free forever

440 Lab will always remain free, ad-free, and without in-app purchases. To run this site locally, download and unzip the latest release, which can be hosted on a webserver like nginx or by directly opening index.html.

Get involved

440 Lab is created and maintained by Jason Parker and is open source. If you find a bug or have an idea for an improvement, please open an issue on GitHub.

If you find 440 Lab useful, you can help by starring the project on GitHub or sponsoring its development.

440 Lab

440 Lab is a free, ad-free collection of simple tools for musical tuning, rhythm, pitch, and intonation ear training.

Tuning and reference pitches

Pitch and intonation ear training

Metronome and rhythm practice

Simple by design

Free forever

Get involved

Play a known note as a reference, or use the microphone to identify a live pitch and see how far it is from the nearest note.

Keep a steady beat while you practice. Tap a few times at the speed you want to set the BPM. The first click in each group is slightly higher.

Hear a reference followed by a mistuned target. Decide whether the target landed flat or sharp.

Listen to candidates and choose the tone that matches the selected note.

Hear a triad and identify its chord quality.

Recall an unfamiliar melody's exact opening frequency after a delay, or recall a target after interfering tones. No note names or familiar recordings are used.

About

440 Lab is a free, ad-free collection of simple tools for musical tuning, rhythm, pitch, and intonation ear training.

Tuning and reference pitches

Pitch and intonation ear training

Metronome and rhythm practice

Simple by design

Free forever

Get involved

Tuning

Play a known note as a reference, or use the microphone to identify a live pitch and see how far it is from the nearest note.

Keep a steady beat while you practice. Tap a few times at the speed you want to set the BPM. The first click in each group is slightly higher.

Pitch Placement

Hear a reference followed by a mistuned target. Decide whether the target landed flat or sharp.

Pick Target

Listen to candidates and choose the tone that matches the selected note.

Chords

Hear a triad and identify its chord quality.

Pitch Memory

Recall an unfamiliar melody's exact opening frequency after a delay, or recall a target after interfering tones. No note names or familiar recordings are used.