I got this book full of chord inversions. I think it gives 3 inversions for every chord. And theres loads of chords ive never even heard of like "agumented" "13th" etc etc. Do i need to learn all the iversions for every chord ? Also am i right in thinking that a chord inversions is another way of playing the same chord but in a different place of the fretboard so that it sounds the same ? but on my guitar it doesnt sound the same ( probably out of tune or something ) any help appreicated...