I use the software irealb pro on Apple Macbook, iPad and iPhone.this software allows to accompany for parties or to rehearse and develop pieces.ideal for teacher of accordion! The accompaniment editor is really very simple and convia, the price of the software is about 15 euros!I have started to write several accompaniments of waltzes musettes, and others. does someone use it? could one create on partitions-accordeon.com a library of exchanges of files? in advance thank you