Yeah I got the copy for Violin with music to listen to. I didn't know you were talking about cello, no wonder I couldn't find the music you were talking about on volume 3

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I think its is a nice way to learn but I think it has been over advertised, make it sound more than it is. To me its just a method of copying, and if you let children to copy from the best, ofcourse it will sound better than the kids who just play what they read from music sheets. Listening and comparing its the main factor of Suzuki Method I think.