Signal Lock

# Match the wave, take the month

The dashed curve is the target. Move frequency, amplitude and phase until your solid curve sits on top of it. Clear three rounds and the promo code appears.

Match **0%** · need 88%

Frequency

Amplitude

Phase

## Locked. Here is your code.

Redeem it in the app for a month on us. Applies to: **** — the apps with a monthly plan.

## How the score works

The match is one minus the RMS error between the two curves, normalised by the target’s RMS — the same normalised-error idea Sonarish uses to score a machine against its baseline. Later rounds add a second harmonic, so the shape gets less forgiving.

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