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Thanks for the links @Mark - really interesting - especially the second item. I usually end up actually going all the way to the fingerboard (although my finger-pressure is pretty light - I mean I'm not actually "stabbing into the strings"), but sometimes I will do as he suggests - and when it works for me (LOL) I get a nice tone from the instrument. I suspect the quality of the sound (and the actual ability to do it) probably depends to a fair extent on the strings and indeed the instrument itself.
I seriously recommend not copying my mistakes. D'oh -
Please make your own, different mistakes, and help us all learn :-)
Good stuff. I was quite surprised to find I could get a clear note without going all the way to the fingerboard. I had thought that would give me harmonics.
It will take some practice to play that much more lightly, but I can see how it would improve speed.
I also like Karpinski's exercize with the middle knuckle, to keep the fingertip loose. I'm still a good ways from being able to do a vibrato, but even now I can tell that will help a lot.