Playing a song with basses
Most people who play the diatonic button accordion don't associate the instrument with the Oumph- Pa- Pa music which many people imagine the minute that you say "Accordion."  But you don't have to go back too many generations in Tejano music to find that exact thing. 

Although we don't use the bass side of the accordion much in Tex - Mex, Conjunto, Tejano or Norteña music, it would probably be a good idea to be familiar with the notes and chords that can be played with the basses.
The notation is Press/Draw or Close/Open.

In order to use the bass chords, we will also need to know the scales closing and opening the accordion.  This is a project that I will be working on in the near future and will be updating this page as I go.