http://www.soundfactorywomb.com How to work with audio loops in Cockos Reaper (http://www.reaper.fm). Time stretch and align samples with the build in match tempo function in the media browser. Or use the alt-shortcut while grabbing the edge of an item to make it fit in your project. Shortcuts, menu options, mediabrowser, playback rate, preserve pitch, item properties, match project tempo of audio loops in a short on point tutorial.