I have a multi-track mix in GarageBand. Each individual track has been recorded without clipping, and at no point during the song do any individual track volume levels go into the 'red area'.
However, at the loudest points the 'overall' track volume (on the bottom pane) goes into the red.
Is this a problem? Will it affect the quality of my exported track? If so, how can I deal with this except for individually lower the volume of every track?