“… ricercari, motets, and Masses help you improvise well, canzonas to play quickly, and madrigals to achieve different harmonic effects.”
G. Diruta, Seconda parte del Transilvano (1609), libro quarto [1]
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[1] In BRADSHAW, M.C. & SOEHNLEN, E.J.: “The Transylvanian” (Il Transilvano), volume II. Henryville [etc.]: Institute of Mediaeval Music, 1984, p.143.

“Do you play different on the harpsichord and the organ?”, asked me Reitze when I came back downstairs from the organ after I played the overture from Siroe. This question could summarize the main topic of the session today in the project around Handel’s keyboard music combining the harpsichord and organ students.
Articulation has been our demon today… Organ players “fighting” with the harpsichord; harpsichord ones “sliding” on the organ… The question: did Handel and his contemporaries find so different the approach to both instruments? How were voiced their harpsichords? Are ours far too soft, influenced by late 18th century French school, and that increases the gap?
In short, around 1700 there was no separation, but just keyboard players (yes, sometimes devoted more to sacred or secular music, of course). But we can say they were the same people sitting on different instruments. We can’t (can’t we?) imagine a completely opposite technique. Is there then, ONE way of playing?
Personally, I am still looking for my “touch” on the organ, and must recognize that the first experience (today was indeed the first attempt of some of my colleagues in the school) was maybe as frustrating as playing the harpsichord for the first time after years of piano playing.
Nowadays the separation exists: we are either harpsichord or organ players, and when we decide to start playing the other instrument, it is never as “natural” as would have been then: now we come from a style and try to adapt it to another one. It’s normal that the question arises… Of course, there are consagrated players that devote themselves to both instruments: we should look there for a practical example (even to ask them, if we get the chance!). But by now it would be very useful to let the instrument sound and “tell” us what works or not…
At the end, we use the same tools: harpsichordists have a wide sampler of articulations in order to “speak”…, and organists legato devices (even overlegato!). It’s just a question of the amount of ingredients we use depending on the instrument. Or don’t we play different in a Giusti than in a Blanchet?