Pressing 'T' will show the binary tresholded image, and pressing the 'N' key will turn the display off, which reduces the CPU usage. Pressing the 'S' key will show to the original source image. Use the 'E' key to toggle in and out of background subtraction mode and use the spacebar to recalculate the background until you find a setting that best tracks the fiducials. You may need to adjust your lighting to help reacTIVision see the markers.īy default ReacTIVision uses background subtraction to help it with tracking, in some cases this can be a hindrance. Here's how to do it: - Download the ReacTIVision vision engine - Download the ReacTIVision TUIO client for MaxMSP - Print out some of the fiducial markers (look in your ReacTIVision vision engine download, under symbols>default.pdf) - Run the ReacTIVision application and hold up the markers to your webcam - you should see the number of the fiducial track with it as you move it around the screen. It was originally written for the ReacTable, a table top multitouch instrument: The software tracks x and y position and rotation and it's great for incorporating real world objects into your MaxMSP patch or making table top interfaces. Return to the inside of the p object once this has been done.ReacTIVision is a free, open source tool that communicates with MaxMSP and allows you to track objects with a camera by attaching small paper markers to them. Additionally, click back to the top level patcher, and connect the midiin object to the inlet of the p object, and two outlets of the p object to the inlets of the plugin~ object. For the purposes of this tutorial, only the 1v/oct, Gate and Vel outlets are used. The Vel outlet corresponds to a signal level for the velocity (which can thus be mapped to other elements within Beap) and the Mod outlet corresponds to changes in the modulation wheel data. The Gate and Trig outlets indicate whether or not a note has been played, and how long the note is held for. The 1v/oct signal outlet corresponds to the frequency of incoming notes. The MIDI to signal device takes MIDI data as an input, and outputs CV, gate and trigger signals.

Go to Beap > MIDI > MIDI to Signal and double click to add a Beap MIDI to signal device.

In order to make use of MIDI data with Beap devices, a method for converting MIDI data into CV signals, gate signals and trigger signals is required.

Max 7 synthesizer patch