Concertina
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Download or edit the free picture Concertina for GIMP online editor. It is an image that is valid for other graphic or photo editors in OffiDocs such as Inkscape online and OpenOffice Draw online or LibreOffice online by OffiDocs.
A student model with colored buttons to facilitate the orientation of the fingers: the white buttons are for diatonic tones, red is C, the black buttons are the accidentals.Free picture Concertina integrated with the OffiDocs web apps
