This tool can be used to measure the in-tune note pitch and musette offsets for
MM (2 reeds/note) configured accordions.
This is a free open-source AI collaboration experiment.
Use it at your own risk.
I make no warranty as to its accuracy or usefulness.
Please sanity-check any results against a professional accordion tuner program like Dirk's Accordion Tuner before modifying any reeds.
How to use the tuner:
1) Select your A4 tuning
Range is 438-446 Hz, default is 440 Hz.
2) Select your note detection options
Check the Low note mode checkbox to improve results with notes C4 or below
If measuring a dry-tuned accordion, the Dry or Very Dry options on the Dry tuning sensitivity dropdown may provide better results. (Default is Normal)
3) Start the tuner
Click
START and allow microphone access when prompted.
For best results, play one steady note at a time.
Hold the note for a moment so the display stabilizes.
Tips: use normal bellows pressure, avoid vibrato, and tune in a quiet room.
4) Watch the live display
While holding a steady note:
- Note shows the detected note name (based on the reference reed).
- Reference shows the measured frequency of the reference reed and delta in Hz and cents from ideal ET.
- Needle shows the musette reed offset relative to the reference reed (normally to the right).
- Musette shows the cents and beats offset of the musette reed relative to the reference reed.
5) Release the note to lock and save
When you stop playing, the tuner automatically locks and saves a row in the table.
The “Saved” indicator confirms the measurement was recorded.
6) Understand the results table
Each saved row includes:
- Config:
Always MM in this version.
- Note:
Note name.
- ET Hz:
The equal-tempered target for the detected note.
- Ref Hz:
Measured reference reed frequency.
- Δ from ET:
Delta of the reference reed from equal temperament, shown in Hz and cents.
- Musette:
Reed-to-reed offset in cents and beats relative to the reference reed.
Click the red x to clear the results.
7) Measure the next note
Click NEXT NOTE to reset and repeat for another pitch.
8) Live mode
Check the Live mode checkbox to continuously recognize notes and musette offsets without saving results.
9) Printing the results
You can use the Print feature in your browser to print the results table.
10) Export the results as a CSV file
Click CSV at the top of the results table to export the results as a CSV file.
The file will be saved into your browser's default Downloads directory.
Limitations
In Dry or Very Dry mode, the tool may still struggle to provide accurate musette measures for dry-tuned accordions.
Tip Jars
This tool was created by
Michael Eskin.
If you find it useful, please consider making a contribution via my online tip jars:
Source Code
The full source code for this tool is available on my GitHub repository.
The source is completely contained in the one file: accordion-tuner.html: