Thanks to all for your inputs... The difficulty I am encountering is more in synchronizing the two hands than in trilling... More precisely, my problem is to produce a nice, smooth end of trill with the two hands in phase !I am now trying to trill two notes right hand (2x32nd) for one note left hand (1x16th). That allows me to be "mathematically" accurate and, above all, to finish the trill "nicely" (still it gets difficult while speeding up the tempo...). So, I wonder if that "trick" is a good solution ? And, if I end up mastering it even while playing fast, will it be musical ?Thanks to all of you again and have a nice musical day !Drooxy