All devices need to be in program mode (P) to bulk sync your controller to your modules and Audio Box. To enter program mode, power on the controller, and after the controller completes the startup sequence, press and hold the SYNC button. Repeat the process on your modules and Audio Box. The 18M and 6M firing module can be put into program mode (P) even faster by simply pressing the SYNC button while turning on the device. The Audio Box, 36M, and 72M do require the device to be powered on with the startup sequence complete before pressing and holding SYNC to place them in program mode (P).
Once your devices are in program mode to sync the two devices, push the SYNC button on both the controller and the device for about one second and then let go of the buttons. You will see the SYNC LED flash and the device will restart. Repeat for all devices that need to sync to the 18R2.
You do not need to restart the controller between syncing devices. Simply go from one device to another performing the sync process. It should take 2-3 seconds per device using this method.