Logic Pro 9: Audio and Music Production The next step is to use the track freeze option. Freezing effectively creates an audio bounce of the track in question, complete with all its inherent plug-in settings, and then deactivates the plug-ins accordingly. If you then try to edit any part of the track ­ either opening an instrument or plug-in or repositioning a region ­ Logic will remind you of its "frozen" status. If you do need to carry out the edits, simply unfreeze the track, make the modifi- cations, and then refreeze. Freezing itself is carried out with the small freeze icon as part of the track header. If you can't see the icon, select View > Configure Track Header and then add the freeze button into the set of options. Note that the freeze occurs across the full duration of the project, so it's worth moving back the project end marker to the real finish point of your track. As an alternative, you can also carry out an audio bounce yourself, simply rendering complex virtual instruments as audio regions, saving off the instru- ment settings, and packing away the MIDI data (just in case you need to go back). This can be an effective solution earlier in the project where you intend to do lots of structural rearrangement with the regions at a later point.