Can audio from only specific apps be routed to a Bluetooth speaker?

I set up a cheap Bluetooth speaker to work with my mother's tablet, and it is working fine, but I really only intended it to be used for playing MP3s and streaming audio. When she operates the tablet in the house, every little click comes from the speaker in her bedroom. Is it even possible to have normal operating sounds stay routed to the internal speakers while Music and things like I Heart Radio go out to the Bluetooth speaker? Is there an app that will do that? Tablet is an LG GPAD 7.0.