On the weekend, I whipped up a little application called da_Start. It's on the AVD web site. This tool allows you to use an "DMX Open" dongle to set the start channel on my DC24 / DC48 DC controllers as well as the Tiger 48 / 120 DC controllers. Operation is pretty simple. Plug your open DMX dongle into the PC Connect the DC controller to the DMX dongle Run the da_Start application Select the correct dongle from the list at top (not required if only one detected) Choose the type of controller (Board Type) Set the desired start channel Click the Open Port button to start sending the data via the dongle Follow the (separate) instructions for your controller All done! If you forget to connect the dongle before running da_Start, plug it in and wait about 5 seconds before pressing the Rescan button to update the list at the top. The CH1 and CH2 labels at the bottom right show what DMX values da_Start will send for the selected board type and start address. I hope to add DMX Pro dongle support soon.