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I notice from time to time I get a loud obnoxious metallic "TWANG" type of sound from my open A string. It doesn't happen reliably and I can't seem to do it intentionally. Often happens during pull-offs or string crossings. It will make this noise and then settle in to the string's normal tone.
I don't know what's the cause of it or the solution. Strings and string materials seem to make no difference. It occurs more often with more responsive strings(such as steel) but still occurs with nylons too.
Thanks for the input.
I think you might have got it. It's what makes sense. It would seem to be a fingerboard smacking issue.
Playing hard is a habit I'm trying to break myself of but I can't seem to help it when I'm cranking out a fast reel or hornpipe. I've come to accept it's just my style. As tiny as these things are and as light as the bows are, it's hard for me to avoid putting down some force at times, especially at speed.
The most practical solution at this time(aside from switching to viola) would seem to be switching to high tensions strings. I just ordered some mediums for backup strings too.
I thought about the theory that I'm playing it too hard and I've tried my hardest to induce it with thrashing and playing that string as hard and quickly as I can. Alas, it can't be done. Something else must be occurring.
Interestingly, I've upgraded rosins from a very light yellow rosin to a red, medium-type rosin. It's just as smooth but has far more grip. I haven't been able to play as much but it hasn't happened again yet. I'm going to try to play more this weekend so we'll see.