Turn off beep on RFD8500 sled

I'm developing an Application where the Zebra RFD8500 Sled scanner communicates with an  Android phone via Bluetooth.

I want to programmatically turn off the beeping sound on the RFD8500 Sled when I scan a barcode, so I can play my own custom sound. I've seen examples on how to initiate the beep sound on the Sled through the "Zebra Scanner SDK for Android developer guide".  And  I understand how to play a sound on an Android phone which would replace the Sled's beep.  But haven't seen anything with regards to a config parameter setting I could set programmatically that would turn off the Sleds' sound altogether.

Any thoughts?