Sneaking up on Boo Radley

This has nothing to do with:
http://www.bookrags.com/notes/tkm/CHR.htm
but it has to do with playing some lined out music that I had recorded from a Primative Baptist Choir. It is similar to a bagpipe the way the people slide into notes and the leader gives a line the people sing and while they are singing he give another line.

I was playing some and it spooked Alex. He hid for more than 2 hours. I wonder if he is scared of bagpipes.