Thanks, Mac.

I don't think this is the issue because playing the first bar of 8 tunes takes much less time than is allowed before the screensaver on my desktop is activated, and the screensaver on my laptop is switched off.

In any case, if it's possible for a screensaver to crash BIAB there's a problem in BIAB that needs to be fixed! Unless I'm much mistaken, all that a screensaver does is to change what's displayed on the screen - any program that's running when the screensaver is activated continues to run invisibly, and its output becomes visible again when you move the mouse.