Or in my case, not being able to sightread cost me a working gig. I had an audition last night with a 12 piece outfit (guitar rhythm section with 9 horns) that works from a book with 500+ charts They said ahead of time the charts were half and half changes/notated. I was expecting fakebook style chord charts with some notated figures. WRONG-O. What the band leader put in front of me was my own book of big band style arrangements in F clef, with 80% of my lines completely notated. My stomach sank through the floor. To everyone's credit, though, they were very cool and encouraging. I got through about 9 charts that *did* at least have chord changes above the measures, since I was completely upfront about my dismal sightreading. We did some swing, rockers, slow blues, a touch of funky. After an hour they cut me lose. BTW, if you ever get the chance to play in a rhythm section with a full horn line on top, do it! It's too cool! Anyway, the point is the leader told me they dug my playing but must have a fluent sightreader. I'm betting if my sightreading was even just half as better as it is now, I might have had a shot at the spot. Guess who's gonna be busting out the exercises?