Recently I regularly tune my guitar to Eb. Some people say it shouldn't effect the sound, a F chord is still a F chord, nomatter how you tune your guitar. I disagree with this. The looser strings give a different sound and you play different chords as usual. Instead of playing dull Am-G-F-E chords you get Abm-Gb-E-Eb chords like playing the black keys of a piano instead of the whites.
