Ok, it's slightly off-topic, but I know that many subscribers of this list is very good at notation of classical music. I trust in you, my friends! :-)
I usually play jazz, but currently I work with a piano sonata by W A Mozart. There are some grace notes in the first movement that I'm not really sure how to play.
Should the all be played as appoggiaturas? What time values should they have? All sixteenth, or half the time value of the following note?
In music from 2nd half of the 18th century (e.g. that of W.Mozart) there are 2 appogiatura types, the short and the long the latter of which is always played _on_ the beat. Most often (but not always) the duration of the appogiatura note should be the half of the duration of the note to which it is connected. This rule seems to apply on all the appogiature in your sample. For further, but not too lengthy reading, I recommend the article on 'appogiatura' of Willy Apel's one volume 'Harvard Dictionary of Music'
For on-line references I recommend the article on 'ornamentation', http://www.dolmetsch.com/musictheory23.htm of 'Music Theory Online' found at the Dolmetsch web site. In our own archive Jean-Pierre Coulon has contributed a French edition, http://icking-music-archive.sunsite.dk/scores/bach-cpe/versuch.pdf of C.Ph.E.Bach's 'Versuch über die wahre Art das Clavier zu spielen' which is among the most important 18th century sources of ornamentation. Another important source of 18th century performance practice is the violin tutor by W.Mozart's father Leopold. I didn't manage to quickly find an on-line edition of that source.
Bye -- Christian Mondrup, Computer Programmer Scandiatransplant, Skejby Hospital, University Hospital of Aarhus Brendstrupgaardsvej, DK 8200 Aarhus N, Denmark Phone: +45 89 49 53 01 - http://www.scandiatransplant.org
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