Hi all - Suddenly things seem to have clicked for me and I am able to change chords, make up melodies, play more cleanly. Playing an Ibanez Acoustic electric with steel wound stings. Started using a small amp as things began to come together-- Problem: . Ive noticed that sometimes unplayed strings- usually the A I think -- will ring out. and continue to vibrate, muddying the sound- any thoughts? Thanks John