Demonstration of my free Open-Source Accordion Musette Tuner (MM/MMM)

Note 13 January 2026:

Video shows detecting MMM musette offsets as well as MM.

MMM was removed in a later update as it wasn't working well enough to continue work on.

--------------------------------

Demonstration of my free open-source Accordion Musette Tuner (MM/MMM) tool located at:

https://michaeleskin.com/tools/accord...

This tool is able to determine the note name for any note, the offset of the in-tune reed from the ideal equal temperament frequency, and the musette offsets in cents and beats-per-second (bps) from the in-tune reed of the musette reeds in both MM and MMM configurations.

It supports A4 tunings from 438 to 446 Hz (default is 440 Hz)

This effort was a collaboration with ChatGPT and inspired by a similar tool put together using Google Gemini by Spencer Jones on the Accordion Repair group on Facebook.

Latest features as of 8 Jan 2026:

1) New "Live mode" feature that just runs continuously showing detection results without saving the results.

2) Offsets are now displayed in beats as well as cents.

3) You can print the results or export them as a CSV file.

Limitations:

In some cases, note and musette detection may struggle for notes C4 and below.

This is an free open-source experiment. I make no warranty as to its accuracy or usefulness.

Use it at your own risk.

Source code is on GitHub:

https://github.com/seisiuneer/abctool...

File is:

accordion-tuner.html