Wonderful Cacaphony
Can you tune a bunch of diatonic harmonicas with precision in the same room at the same time?
Of course you can!
https://harp.andrewzajac.ca/Tools
This is a moment captured during a harmonica repair workshop in Kingston, Ontario on 2015/05/16. The was the first time each of the participants used the French Tuner and I was impressed at how well they could tune a harp! Great job, guys!