So, as a general rule is it correct to NOT use pedal in either Baroque or Classical?
Hi Joe,
I don't think so. First, in Beethoven's works (sonatas, e.g.) pedal is very important, for example in the moonlight-sonata 1st mmt, which, without intelligent use of the right pedal won't sound good, I think. No matter if Beethoven already had his Broadwood or not. (He had not, since moonlight is of 1801 or 1802, and the broadwood came later - a fact which A. Schiff, e.g. in his lectures neglects, but nevertheless might be useful here ).
Pianos / grands in Beethovens time sometimes had 5 or more pedals, and I don't think they only were made to look nice.
And in Clementi's Gradus ad parnassum we'll find pedaling, too. SInce Clementi was one of the first who became conscious of the possibilities "newer" pianos give to pianists. And he used these possibilities.
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Baroque music:
Today, we have the chances to use outstanding pianos and grands, with their pedals and with all of their possibilities, when we play Bach, Scarlatti, etc.
But we can also play them on a Cembalo, if we have one, or on other similar instruments.
What we
shouldn't do, is, in my opinion, to try to make our modern grands / pianos make "sound like a cembalo": (e.g. by some "miraculous touch" ( which of course doesn't exist ), or / and additionally, by NOT using pedals):
First, we wouldn't succeed, and secondly, the reason is, that we make a
bad compromise:
We don't use the full spectrum of features our piano / grand offers, and SIMULTANEOUSLY, the specific features of a CEMBALO (or sth. like that) aren't available, either.
As we can see, that's no good.

What we
should, imho, do, is:
1 ) to play baroque works on a cembalo (or similar instrument), using all the features they offer,
OR
2 ) to play baroque works on a modern grand / piano, using all the features they offer.
Cordially, 8_octaves!