This tuner is developed for tuning of accordions and similar 'free-reed' instruments such as the diatonic harmonica, the concertina, the bandoneón, the melodica and the reed organ.

accordion tuning. accordion tuner
Dirk's Tuner is developed for professional experienced tuners, but because it gives good insights in the tuning process, it is very suitable for beginning tuners as well.

Tune accordions quick, easy and professional

• Tuning of tones with 2 and 3 reeds (at the same time).
• Tuning of chords. (3 reeds at the same time).
• Tuning of basses. (2 or 3 reeds at the same time).
• Tuning with your pc or laptop with external or internal microphone.
• Detects and displays note and octave automatically.
• Automatic correction of deviations in the accuracy of the sound card.
• Zoom to a full screen for a clear overview.
• Freeze the screen to easily examine the values and graphs.

• Play notes with the sound card.
• Automatic or manual selection of the note to measure.
• Very high accuracy of better (less) than 0.05 Hz.
• Automatic reduction of unwanted background sounds and disturbances.
• Very large range: E0 up to C9.
• Frequency of the A is configurable between 430 and 450 Hz.
• Transpose.

The unique possibilities of this tuner simplify and accelerate the tuning process considerably. The tuner has a large range from E0 up to C9, a very high accuracy of less than 0.05 Hz (waves of longer than 20 seconds) and can measure to three reeds at the same time. Because of this the tuning of the accordion can be measured without disabling reeds before opening the case. The real frequencies of the reeds which are influenced by each other and by the case can be measured now. This way it is considerably simpler and quicker to select the reed that deviates and needs attention. The tuner measures beat counts that arise because the reeds sound together and shows these in Cent or Hertz. Beat counts cannot be measured accurately enough by measuring the reeds separately, but by measuring them at the same time it is accurate enough. The measured beat counts are compared to the beat list of the accordion concerned which indicates the desired beat count for each note. This beat list can be produced rapidly and simply using a graph in the tuner.

accordion beat list
Measure chords and octaves
Also chords (three reeds) and octaves (two or three reeds in several octaves) can be measured by the tuner, so the case does not need to be opened for these as well.

The tuner can be extended with a module that can record and save all notes of the accordion quickly and create a report afterwards. This report gives the error of each reed in an easy to read table. After opening the accordion, the reeds which deviate too much can be corrected on the tuning table using the values from the report. The reeds (that have a deviated frequency outside the case) will get the correct frequency after being put back in the accordion. The report can be printed again afterwards and join the accordion as a tuning report.

With the module 'record and report' the possibility is given to create (unknown) beat lists of existing accordions. This way you can easily copy the tuning from an existing instrument to another (or to itself)!

accordion tuning report

Daniel Strohmeier, Strasser:
"I work at Harmonika-Erzeugung Strasser with your tuner. it is a great tuner, that helps me find the wrong reed and correct it quickly."



Pierre Laurent, L'atelier Souffles:
"I enjoy using the accordion tuner as it is very simple and effective to use. I love being able to measure three notes together, very helpful. I strongly recommend the use of this software."

Dag Granéll, Beltrami:
"The extra module is in fact indispensable. It makes everything much easier and clearer. Quickly print a report. I did that with Excel before, and now it’s ready in no time."