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Hmmmm ok so theres not much we can do in the way of bebung then?
Quite the contrary. I didn't know which Mazurka you meant but have just looked at my own copy.
The bebung as a form of repeated emphasis is found in bars 1,4,5,6,9,10,13,16,17,18 etc. etc. The accent should be on the initial beat with the repeated note in the 4th semiquaver being without emphasis like a graceful echo!
The allusion to the Baroque bebung is repeatedly found in Chopins use of the upper mordant in bars 8, 11, 20 and then throughout in the same manner.
The clavichord was, and is, known for it's grace, charm and subtle effects. I think these should be the aim when playing this little piece, described by some as being superficial and mundane. I think it is a charming little piece and it's good at grade 7 people are playing proper music!
flutey toot - i hope this helps