TapTune

No MIDI device

Not started.

Audio output delay

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MIDI → sound start

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time inside this page, last note

Notes played

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Samples

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decoded in memory

The keyboard shows the notes your books play (set them in Setup). You can also tap the keys here or use the computer keys A S D F G H J K (W E T Y U for the black keys).

Books

Volume

Release

Bluetooth timing

Setup: books, notes & sensitivity

Connect the board to set up.

Debug: live sensors

Every touch pin on both boards, live. Rise = how far the pin is above resting right now; peak = highest in the last moment, after removing ground noise; it has to cross the threshold to play. Ground noise = how much all pins rose together (e.g. when you touch the phone); the boards subtract it.

Main ground noise — Second ground noise — show pins without a book

Pin	Book	Rise	Peak	Noise	Threshold	Level

Wave

Book Blue = how far the book's signal rises (ground noise removed). Red dashed = touch threshold (drag it), grey = release. Orange band = touched, dot = note played.

touch at — or drag the red line on the graph

Timing (Bluetooth)

Each bar is one note: how late it arrived compared with the fastest one. Spread = jitter. With Steady timing every note is played at the green line instead, so they all come out evenly.

Touch log

Touch a book…

Getting the lowest delay

All: use wired headphones or speakers. Bluetooth audio adds 100–250 ms.
Windows: Chrome or Edge. Set the sound device to 48 kHz and turn off "audio enhancements". Close other apps that use audio.
Mac: Chrome. Built-in speakers or a USB audio interface are fastest.
Android: Chrome, with battery saver off. Phones vary: newer Pixels and Samsungs are fastest. If the delay shows over 40 ms, try another device.
The Audio output delay number above is what the browser reports. Touch to MIDI on the board is about 4–6 ms on top of that.