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Stradella Bass System & Piano Accordion Chord Charts is a useful tool for all accordionists who want to expand their repertoire. I believe that the ability to produce harmonies typical of certain musical genres is an excellent source of inspiration to improve music skills and grapple with new challenges.

For this reason, I’ve created a series of new charts specifically designed to facilitate learning the positions and combinations of the most used chords in many musical genres, from jazz to pop music. I selected just the most useful accordion chords and displayed them in the easiest way for the left and right hand.


Accordion chord chart example


Accordion bass charts are in “mirror view” and keyboard charts are in a vertical perspective to imitate an accordionist point of view.


Chords on Stradella bass system accordion

Usually, a 120 bass accordion has 2 rows of single notes (bass and counter-bass) and 4 rows of chords (major, minor, seventh and diminished) but it can play many more kinds of chords in all keys. It might seem that the accordion can only play traditional or classical music but recently the left-hand technique has evolved allowing you to fully exploit the potential of this instrument.

Dm7 chord


In a Stradella bass system accordion, it is possible to form complex chords by combining two or three chords, thus giving the accordionist the opportunity to explore many musical genres.


What chords can be played on an accordion?

On a 120 standard bass accordion, you can play all these kinds of chords:


How to find the chord charts:

  • Select the root on the main menu and find the chord you are searching for or
  • click on the category list on the right sidebar or
  • click on “All chords” on the top menu.


Bass Accordion Charts

I’ve also created a detailed diagram and a list of all available chords on each different size of accordion, from 8 to 120 bass buttons. All Stradella bass charts show which notes are played by each button and many other details.

48 bass accordion chart 8x6 layout


What chords can be played on your accordion?

Explore the potential of the Stradella bass system. Find out what chords you can play on your accordion:


Tutorials, lessons, and quizzes is a growing resource for beginners and advanced accordionists. I will post music theory lessons, exercises, quizzes, and tutorials to improve your technique and expand your knowledge.  Bookmark to your favorites and keep visiting!