Once you set a template spectrum for the Match EQ plug-in in Soundtrack Pro, you won't be able to clear it and then choose a different template spectrum. This happens when you're using Match EQ in an audio file project and have already chosen a template spectrum but wish to clear it and choose a different one.
If you Control-click the Learn button under Template and choose Clear Template Spectrum from the shortcut menu, the function seems to work, but when you select a different audio file by choosing Generate Template Spectrum from audio file..., the waveform for the original file appears again.
To resolve this issue, remove the Match EQ plug-in from the project and then reinsert it. If you haven't yet applied Match EQ to the project, simply pressing the Cancel button should work. You should now be able to choose a new audio file as a template.
This document will be updated as more information becomes available.