Sorry for my ignorance, but here goes:

I want to buy an XD3 but how do I control the chords on the left hand as an accordionist? Since I use counterbass about 99% of the time I don't know how the XD3 would know if I was on a C chord or a G chord, for example. And would it try to change the chord every 2 seconds?!

Also, if I go with manual bass, then I am playing the bass but how does the arranger know what to do with the chords? Does this defeat the purpose of having an arranger?

I'm obviously confused.

Thank you.