CAST · ALONG · tap with whatever is playing

Tap along.

Whatever you're hearing — Spotify in another tab, a car going by, music in your head — tap with the beat. Space, click, or touch. You'll see your BPM, your drift, and how long you can hold a steady run.

Tap the circle, press Space, or click anywhere on this page. Eight taps in and we'll lock onto your tempo.

TAPS 0
DRIFT ms variance
STEADIEST 0 in a row
FEEL

TEMPO over last 64 taps

fast slow

Your tempo line will start drawing once you've tapped ~8 times.

A soft click on your inferred grid helps you hear where you've landed. Toggle on once you've locked a tempo.

YOUR LAST 12 INTER-TAP GAPS

What this is for

Spotify and Apple Music have a billion verbs you can do to a track — like, queue, save, share. They have zero verbs that ride with a track while it's playing. /cast-along is one verb: tap.

Tap with whatever you're hearing. The page doesn't know what you're listening to, doesn't need to — it just measures the gaps between your taps and tells you what tempo you settled at, how much you drifted, how long you held it.

Pair with /cast-jam for keys-locked melody play-along, /cast-loop for layered loops, /cast-metronome for hard time, /cast-pulse for grid composition, /cast-wander for generative ambient, /cast-wheel for harmonic geography, /cast-tone for tuning drones.