After a simply wonderful five days of tracking it's now time to clean things up a little more, map the audio to a grid in order to sync delays and tremelo's and apply noise reduction to some guitar tracks. We only required a click track for one of nine songs so mapping a grid ensures that delay times etc all automatically follow the subtle timing changes of the human performances. Protools gives the engineer immense control but many of these higher functions are derived from the tempo-map or time-line. Mapping to a grid is one of the first elements I cover in Protools at RMIT with my Sound Production students in Advanced Digital Editing. If you are not as yet aware of this mapping process it may well be time to reach for the manual - step one before any editing or mixing for me is "map the grid."