AR
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b. 6
Almost all sources feature a crotchet rest on the 3rd beat in the L.H. It is only AK that has an a-c1 third - it repeats two elements of the previous chord. The authenticity of the version of F with the bass moving to A has to be considered dubious - it is most probably Fontana's revision, continued in the subsequent bars of F.
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See b. 7-8
category imprint: Differences between sources
notation: Pitch