Common pins (4 & 9) , Normally Closed pair (3 & 10) to device 1, and Normally Open pair (5 & 8) to device 2. one of the common pin should be your input (Audio), Connect normally closed to a speaker.
When delay circuit is active, energize the relay, so your audio input will go to the pin 5 and 8. which will do nothing and when delay is over, Deenergize the relay. Hope this helps.
-