Good evening
Personally, I use a lot of mp3 playback accompaniments, unfortunately there are few good and free ones
In my opinion however the best (to my taste) and not expensive, are those made by ERIC BOUVELLE, (collections the classics of the musette, my ideal ball etc...) Each album is sold at a very very reasonable price and if you do not want all the titles you can buy (in download) only the titles which interest you also I put you the link of the editions Pluriel, you will not have any more but to follow the instructions to buy and download
WWW.PLURIEL.COM
Go also to the site of Jérôme RICHARD, or also Jérôme ROBERT, there are all the playbacks of their creations and it is free if you create an account.
I wish you a lot of pleasure
Accordially
Jean-Pierre