Does anyone have experience modifying fogger timers?

I am trying to fire a pirate ship cannon fire (fog), incorporating light and sound. The cannon is built from 4" black pvc pipe. I have a number of 400W fog machines with remote variable timers for them .

The variable timers are made by Fitco - I believe the IA231.

I would like to use the output of the timer to trigger the fog, a light and the sound of a cannon firing. I am thinking the output of the timer could be used to drive the fog machine and light but I need help triggering the sound.

Any Ideas?