I don't know why, but the current system only allow for 1 specific audio when interrupting.
This is very limitating.
What I would like to be able to do (as pretty much all business does) is the following:
Play hold music
After 30 seconds (Or maybe a random number between X and Y like 30 to 45 seconds), interrupt and play a RANDOM (Or in specific order) audio clip
Start hold music again
After 30 seconds play ANOTHER clip.
Repeat for as many audio clip you have (interruption audio clip)
That would allow us to have smoother wait experience and even place audio like "did you know that our company offers ...." AND "your call is important for us" randomly during wait time.