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Oleg Twerdov

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  1. JackM
    August 25th, 2015 @ 9:49 pm

    Finally! An explanation of how to determine intervals on a guitar fretboard that makes sense. Clear, concise, straight forward. This should be the de facto presentation in every music theory book for guitar. Thanks a million!

  2. BT
    December 30th, 2016 @ 10:07 pm

    I have had a headache trying to learn from to many so called experts. This is clear and I actually understand it. Thank you so much! I agree with Jack ?