Hello Megha and welcome to the Cow Audio Forum.
You don’t tell us much about your band, but the louder the music, the more difficult the ability to record it well with a built in mic. Most of these mics are not engineered to withstand loud sounds. When they do, they distort and can’t be turned down far enough not to distort.
Recording bands properly is trickier than most people imagine. Even good mics mounted on a camera don’t do the job very well, especially if the band has singers. The sound of a singer’s voice through a PA system is very inferior to the sound of the same voice recorded directly from the board. The person mixing the live event is blending certain sounds from the mix with the sounds from amps and instruments on stage to get the total sound.
To get good live music event recordings, you need each source on a separate track and mics to record the room (or space) as well, in order to recreate the live event properly during a mixdown later.
Regards,
Ty Ford
Want better production audio?: Ty Ford’s Audio Bootcamp Field Guide
Watch Ty play guitar