Was there security footage audio of columbine highschool?

When I watch documentary's the surveillance footage is on and I can hear bombs exploding and stuff.

There was no audio on the cctv no. The emergency calls have some things going on in the back ground but it’s not entirely clear.

Bookish wrote:

There was no audio on the cctv no. The emergency calls have some things going on in the back ground but it’s not entirely clear.

Exactly.

The 911 library call is AFAIK the only known audio of the event that was made public. There for sure must have been other 911 calls from students inside the building etc, but I do not recall any of them being available in public.