QUOTE(gwu @ Dec 8 2007, 07:30 PM)

Have you tried, for the guitar, D'Addario strings? They settle very quickly particularly the Pro Arte Composites but the EXP45 are also easy to settle. You can help your strings settle faster if you stretch them i.e. tune them approximately to the correct pitch, then pull it upwards away from the fretboard by giving the string a good tug a few times. Also, leave them tuned above the correct pitch for the first night after changing to new strings so again, you're stretching them.
I use whatever the local music shop has available - there's not usually much (any!) choice.
I stretch it, I leave it tuned sharp when I'm not playing, I do everything I can think of to get it to settle in quickly.
Last time I replaced the D it took several /weeks/ before it settled and it was very annoying. It doesn't normally take quite that long.
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Do you have an electronic tuner as this will help you tune faster.
I can tune it by ear just fine (and quicker than faffing aorund with a tuner). It's having to re-tune the D string over and over and over during the time I'm playing that's irritating. And having it flatten in the middle of a piece even.
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Bass strings need to be changed more often than the treble strings. There's no hard and fast rule as to when to change as it depends on how much you practise, how you play (e.g. do you play gently or quite roughly), how much sweat and grease there is on your hands and the make of strings.
The D gets changed the most (for obvious reasons), followed by the other wound strings.
Practice varies a lot. Sometimes don't touch it for weeks, other times play quite a bit. It depends on what else I'm doing and on whether it's lying around out of its case (I play a lot more then than if I have to retrieve it from the cupboard and take it out of its case). I play gently most of the time and usually have clean hands. The make of string varies - I use whatever I can get.
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I definitely change my bass strings about 1 week before an exam given that I'll practice about an hour a day before the exam.
I don't do exams on guitar (or violin). Just play for fun. :-)
T.