Greetings HunterGatherer,
Welcome to Band-in-a-Box and to the forum!
Your questions may receive more views and better answers if you pace them in the
+++ Band-in-a-Box for Windows +++ forum section. This section does not receive as much views as it is intended mainly as a section for PG Music Sales and Support to answer questions frequently asked by users.
You may not need to mess with the Windows Control Panel settings. Open the Band-in-a-Box (BiaB) Preferences window with keystrokes Ctrl+E and then choose the "Audio" button which opens the "Audio Settings" window.
Change the "Audio Driver Type" from the default of "WAS" to "MME" and save the setting. Close the BiaB program and then reopen the program.
Although WAS is the preferred setting, not all computers work well with WAS. MME is the most compatible setting with all systems.
Should you need to revisit your question about sample rate setting, check out
+++ THIS +++ thread.