boardr is a simple, single-page web app that helps you practice the position of notes on a stringed instrument's fret/fingerboard and learn the corresponding notes on a musical staff. The app uses the Pitchy Library for pitch detection.

You can check out a live version of this web app at https://vannrr.github.io/boardr/

git clone https://github.com/vannrr/boardr
cd ./boardr
npm install
npm run build

npm run preview

1. Press the Enable button to open an audio input permission prompt.
2. Select the input you'll be using and press Allow.
3. Enter the tuning of your instrument starting from the top string. Valid formats are note (A-G), optional (b or #), and octave (0-5). For example: Gb0, G1, or G#2.
4. Select the note display format. The Scientific option shows a grid of notes using the same format as the tuning, while other options display notes on a staff corresponding to that clef. A number above or below a clef indicates if the clef is an octave higher or lower than normal (8 = 1, 15 = 2, 22 = 3, etc.).
5. Select the range on the fret/fingerboard you want to practice, with the first number being the start and the second being the end. To practice the first twelve frets of a guitar, select 0 (open string) and 12. Each fret is one semitone, so if the string is C3, then 0 is C3, 1 is C#3, 2 is D3, etc.
6. Select the input channel of your audio device to use. For a stereo input device, 1 is the left channel and 2 is the right.
7. Press Start to generate a randomized list of notes for each string.
8. Click the Current Note button to see the note you're currently playing.
9. If your instrument's note isn't being detected, try lowering the pitch certainty (0.99 = 99% certainty).
10. The pitch meter displays the difference between your current note and the target note in semitones, with the center being 0 difference.
11. As you play each correct note, the next one will be highlighted until you've played all notes for that string, then the next string will be displayed.

This is free software, distributed under the MIT license.