sync~ Synchronization from tap tempo, MIDI beat clock or audio click tracks. sync~ outputs a 0-1 ramp, like phasor~. The frequency of the ramp can be specified in beats per minute (BPM), or by sending sync~ a tempo reference via tap tempo, MIDI beat clock, or an audio signal containing a 'click track.' Also, sync~ generates MIDI beat clock to synchronize external devices.	from the library : MSP 4.5 Format : External Environment : max / msp commercial Max 4.5 http://www.cycling74.com