My Alvarez 12 string was almost always out of tune until I got my electronic tuner. This device has saved me hours of fooling around with trying to get the sound right.

I have a question though. Lately I have noticed that, where I almost always had to tune up from slightly flat as the strings loosened, I now nearly always must tune down because the sound is sharp. Is this a result of increasing humidity or warming temperatures? Or are the strings shrinking?:>}