Sasha Frere-Jones has a fascinating
articlehttp://www.newyorker.com/arts/critics/musical/2008/06/09/080609crmu_mus…; in the June 9
The New Yorker about Antares's Auto-Tune software. In case you aren't familiar with it, Auto-Tune is pitch correction software that is used almost universally in contemporary pop recordings—sometimes just to "fix" an off note, increasingly frequently as an effect in its own right.