This is a Max For Live MIDI device that allows you to use a control surface like Knobbler to send MIDI CC output, for example to an external synthesizer or effects module.
Direct download links below.
If you just want to download and install the device, then go to the Releases page and download the newest .amxd file there. You can also download it directly via the links in Changelog.
Add the device to a MIDI track. Each dial can have a different MIDI CC assigned.
Choose an output for the channel.