I have a Schecter C1 Classic with D'dario XL EJ22 strings, down tuned to dropped A# (A#, F, A#, D#, G, C). The strings are relatively new, but broken in (a couple of weeks old, and I don't play every day). I use a BOSS TU-3 to tune it.
When I tune the guitar, I've noticed that for about the first half second after I pluck the string, the tuning is sharp by about a 1/4 step, then it drops into place at the correct tuning. This occurs more on the lower strings (4, 5, & 6), and happens regardless of how softly I pluck the string.
This concerns me because I play both fast and slow notes, so I want the tuning to be consistent whether I'm playing 1/16 notes or letting it ring out.
What could be causing this problem and how can I fix it?