I am filming a theater performance and karate demo tonight at a Hilton Hotel indoors. Not sure If I should use the shotgun mic or the Caon XH-A1's on board mic. Seems the shotgun sounds a little weird indoors in small areas....not sure how big the room will be for this one. Any thoughts to help me make a decision?

A big room will sound better, because you have less or no reflections from nearby walls.
I suggest bringing the senn k6/66. Listen carefully on your headphones. If you don't like the sound it is a matter of seconds to go to the onboard mic.

A big room will sound better, because you have less or no reflections from nearby walls.
I suggest bringing the senn k6/66. Listen carefully on your headphones. If you don't like the sound it is a matter of seconds to go to the onboard mic.

Right. Even big rooms or outside environments can be problematic for interference tube shotguns.

Try both as Hubert says.

Regards,

Ty Ford