bcAdmin uses the standard application for the file type wave. This usually is iTunes. You can set another application like bcAnalyze as standard application. For this you will need to locate a wave file in the Finder and then do as follows:
Right click a wave file in Finder. Choose Information from the menu. Scroll down in the information panel and locate Open with. Now choose bcAnalyze there and click on the button below to make that standard for all files of that type. From then on wave files are opened in bcAnalyze.