I have Yates' Cello Suites and I'm not a fan of the first suite transposed in C Major; however, it's easier than Duarte's D-Major....a lot easier. I'd say he picked C Major because everyone else picked D Major (and the original G Major doesn't lie well in the normal guitar range, as I've transcribed this myself with the low D and G tuning), and it's easier but it doesn't have the same impact as D major in my opinion.
I can't say about the other Cello Suites since I don't have any other editions of those, except the 5th Cello Suite as that's also the Lute Suite BWV 995 (usually done in A minor, which Yates' puts in G minor, which is actually the "original key" of the lute suite and you down tune the 6 string to D and the 5 to G). He does include "comparison scores" which is quite nice. I'm a firm believer that if you transpose something that's from a Cello or a Violin, you would need to add some good counterpoint which fleshes out the implied harmonies, and of course, this would be somewhat subjective. Yates doesn't seem to add much counterpoint to his transcriptions (with the 5th cello suite excepted because he's following the "lute" version). Duarte, at least in the First Cello Suite, adds quite a bit but some of his harmonies are not quite Baroque.
At any rate, the Cello Suites are a good addition to any library; if anything, an intermediate player or advanced beginner would be able to play the first cello suite a lot quicker than the Duarte version.
I don't have the other books, unfortunately.
What is in the Contemporary book? And what is in the graded studies books?
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