I am wanting to apply music theory to learn zydeco music.Welcome John!
Yet, to further complicatd things, you also have a complete diatonic minor scale and several other scales with accidentals. My advice to you is to print out a diagram of the treble and bass(es) push and pull values and use them to apply the chords and scales of the music theory you like.
The bigger question, however, is what is your goal? Are you looking to play cajun music? To learn jazz voicings? Or ?????
My accordion is in the key of Bflat and yes they do play by ear I also take lessons but I just wanted to see if I could apply music theory to the diatonic accordion.Well, I think that in that case, it might help you to look for online resources that discuss the blues scale and how it is used in zydeco. Honestly, though, I doubt that many zydeco players apply music theory. It's a musical form of rhythm and feeling. I suggest you do this:
1. Figure out what key your accordion is. Either ask who you got it from or use an online app to test the third key "do" as has been suggested above, or your primary bass note. Ask here if you don't understand.
2. Find a zydeco song that you like in the same key as your accordion. Search on youtube, and/or use the "chordify" app if you are unable to determine key by ear.
3. Play your accordion along with the song for 10 hours. It does not have to be all at once. I'm serious, here, just play for 10 hours with one song. You can do it in 2 or 3 days if you have to. If this does not give you a feel for how to apply the notes and rhythm of zydeco, then, my friend, no amount of music theory will help, as this is how 99% of successful zydeco players learn.
3. Try another tune. Try 8 more tunes.
4. Turn off the music and play by yourself for 25 hours.
You now either know how to play zydeco or you never will.
Thank You.Yes, you can! Sorry for the rant above! As Losthobos said, you have to start with your Bb major scale as defined by the buttons. Then look for the relative minor key (G minor) and see how the flat tones are represented. You can then apply your Bb basses (Bb and F) to your G minor scale. Most zydeco players will play a single diatonic accordion in several (incomplete) keys, picking the sweet notes where they fall. Ask your teacher about this! You can do it!
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