QUOTE(lottie @ Sep 23 2007, 11:47 AM)

If I remember the Canon the trill will be from the D to the Csharp which is much more manageable.
Break the trill down over the length of the note (I don't have the music at hand) but if it's a minim with a crotchet tie etc then trill semiquavers. Start on the note that the trill is above and finish evenly on the note where the trill ends. Do count the notes out rather than just a random twiddle or you'll end up on the wrong note at the end and it will sound chaotic rather than controlled. Start with semiquavers and count them out exactly, then you can break it down to demi-semiquavers if the music requires. Trills are a structured part of the music just like there's a definite rhythme to vibrato.
I'll look out the Canon later and hopefully explain it more clearly.... (I've got to dash out just now..)
Thanks Lottie,
the D is a dotted crochet and the Csharp after is a quaver. There is the word 'trill' written on top of the D and nothing else

QUOTE(LooneyTunes @ Sep 23 2007, 02:06 PM)

The trill is from D to C#

that would make sense to me as playing a trill made of D and E and then going onto playing a Csharp would not sound right? sounds right if I play D-C#-D-C#-D-C# (I think?)