Great, thanks for the hint. I've been trying to get mu Launchpad to respond to MidiSendMessage LUA, without much success, so I must be doing something fundamentally wrong. I've mapped all the keys and the controls work fine, but I'm trying to light the buttons on the Launchpad S. According to the manual sending:
Host » Launchpad: Channel 1: controller 0 set to 125-127. which in bytes is B0h, 00h, 7D-7Fh (176, 0, 125-127), should light all the LEDs.
I'm sending the following LUA command, which executes but doesn't apparently do anything:
MidiSendMessage("Launchpad S", string.char(176)..string.char(0)..string.char(125)).
Any ideas what I'm doing wrong?