Diagram of the tuner. The detected string is highlighted in green. The three vertical bars mark minus 10 cents, correct and plus 10 cents. Six arrows link the lanes E2 to E4 to the six strings, from low to high pitch. Below, the microphone, settings, colour theme, help and full screen buttons, stacked along the left edge, are described.

Source code and licence (AGPLv3): github.com/laurentperrinet/guitoune

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