"When I meet a man I ask myself, 'Is this the man I want my children to spend their weekends with?'" - Rita Rudner
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"Why is the harpsichord the perfect instrument for fugue? Cos it is. It's the perfect marriage of instrument and genre.
Might I suggest that the clarity of line we hear in a harpsichord, the extremely rapid decay, avoids any sort of smear. The melodies stand in high relief, the other thing about a harpsichord is you really can't make one melody louder than the other, it's what we call a non-dynamic instrument: much more on that later.
But the beauty of a fugue is you *don't want to make* one version of the subject longer or louder than the others, because that would create a homophonic-sounding texture.
So the harpsichord balances melodies beautifully, it doesn't smear melodies and it's beautifully suited, then, for the polyphonic writing of the Baroque.
--- Robert Greenberg, How to Listen to and Understand Great Music: Fugue