Metronome: Wearable Tempo Display for Musicians

Metronome  • Declassified

A wearable tempo display for musicians, built for the Meta Ray-Ban Display glasses

Client since 2012

The Platform

Ray-Ban Display glasses embed a transparent display directly in the lens, projecting information into your line of sight without blocking what's in front of you. Think of it as a heads-up display you wear all day. Paired with the Meta Neural Band worn on the wrist, they respond to simple hand gestures — no touchscreen, no voice commands, no reaching for anything. It's a computer you wear, not one you carry.

Smart glasses showing a tiny display beside a black textured wristband

Meta Ray-Ban Display — glasses with a screen built into the lens

Metronome Is Built For

Musicians at any level

Instrumentalists who practice with a metronome regularly and want one less device to set up, adjust, or glance at during a session.

Hands playing a keyboard beside an acoustic guitar and laptop

Person sitting by sunlit windows playing an acoustic guitar

Hands playing a Yamaha grand piano keyboard

Solution

The beat, in your peripheral vision

A steady pulse that sits in your field of view while you play. Audio and visual indicators work together so you stay locked in, even in a noisy room.

Metallic METRONOME title with glowing musical note

Set it once. Don't think about it again.

How Metronome Works

Dial in your BPM, time signature, and note subdivision. The display pulses with the beat. Audio runs alongside it. Adjust on the fly without breaking your rhythm or setting down your instrument.

About L+R Baseplates

An open-source starting point from our team

This is a Baseplate application — one of dozens of open-source foundations built by L+R as part of our alpha partnership with Meta on the Ray-Ban Display platform. Baseplates aren't always finished products. They're minimal, readable, and forkable. Built to show what's possible and give developers a working foundation to learn from and build on.

See it in action

Play with Metronome live →

Check the source code

View Metronome on GitHub →

The Bottom Line

Metronome focused on supporting musicians through a simple, useful digital tool. The broader challenge is making utility feel immediate enough that it disappears into the workflow. L+R brings strategic design, technical execution, and meticulous craft together so emerging technology becomes useful in the real world, including AI when it has a clear role. If your tool needs to become easier to rely on, connect with our team.