Drone Anchor

Each round names an interval to tune above a held drone. Drag the slider or the canvas to move your note; the screen shows the acoustic beating as a pulsing meter and a beats-per-second readout. When the beating stops, you are sitting on the pure, just-intonation pitch, lock it in. Six intervals make a challenge.

• Tune your note so the beating against the drone slows to nothing
• The meter pulses when detuned and steadies when pure; cents-off is shown too
• Lock in each interval; closer to pure scores higher

• Desktop: drag the tuning slider or drag across the canvas, toggle sound, hear the pure target, then Lock it in
• Phone & tablet: drag the slider or swipe the canvas to tune

• Daily: a shared set of six intervals seeded from today's date
• Practice: fresh challenges on demand

• Turn sound on and tune by ear, the slowing beats are a clearer guide than the numbers
• Use Hear pure target to memorize the goal, then steer your note onto it

Drone Anchor trains fine intonation by teaching you to eliminate beats against a drone, the way string and wind players tune.

• Skills: intonation, tuning, acoustic beats, ear training
• Best for: roughly grades 7–12 (ages 12+)
• For parents & teachers: fine intonation, the way pros tune.

Tuning an interval above a held drone while a meter shows the acoustic beating is how tuning is really done — by ear, against a reference, listening for the throb to slow.

Displaying beats per second is the original instrumentation.

Beating is physics rather than opinion: two close frequencies produce a pulsation at their difference, which vanishes when they match. That is why just intonation intervals sound locked and slightly-off ones shimmer, and why a drone is the traditional tuning aid.

Drone Anchor trains fine intonation by teaching you to eliminate beats against a drone, the way string and wind players tune. It is an original, free browser game built in-house for PlayPendium.

A free, original browser game on PlayPendium. No download, no install.