If you have more than one Soundtrack Pro multitrack project open, you may experience a long delay after clicking a tab to switch projects before you can start working on a different one.
This happens if the projects are at different sample rates. Switching between projects that have the same sample rate is fast. In Soundtrack Pro 1.0.3 or later, choose Soundtrack Pro > Preferences > General and deselect the "Switch Hardware Sample Rate to match Document" setting. Although the Soundtrack Pro 1.0.3 update is recommended for all Soundtrack Pro customers, you can avoid this issue in earlier versions if you try to work in projects that use the same sample rate whenever possible, work in one project at a time, or modify a project to use the same sample rate as your other projects.
This document will be updated as more information becomes available.