Picked up a lot of EFX-TEK controllers off ebay (I buy all of them I can find). I got 2 AP-8's but they are missing the audio chips. Are these still available? I don't have one to reference to see if I can find them.
The chip you're looking for is called the ISD25xx series -- the last two digits indicate the duration in seconds. The boards were built with the ISD2560.