In the pro version you can assign channel 6 to control 3 different sounds. It's typically on a knob on your 6-channel radio. You turn the knob and one of the 3 sounds plays depending on how far you turn it...

You can find documentation here: http://rctankelectronics.weebly.com/download.html


On a related note - does anyone know how to create sounds? I used an audio editor to save a sound file as a mono, 8-bit, 22khz sample... but the file wouldn't play. It was about 600kb, but I think I read that anything smaller than 1mb was good. Anyone had success making their own ibu2 sound fx?