Drag and drop audio files on buttons

[Alfenstein8]

I use LPHK to make my Launchpad a soundboard. But every time I add a new sound I have to type the SOUND command and remember the filename. I would be really nice to be able to just drag an audio file on a button, and it will automatically write the SOUND command with the correct audio file.
The color of the button could be chosen randomly or with a color picker.