vbapan~ providing surround panning for sound sources in multi-loudspeakers environments using Vector-Based Amplitude Panning (VBAP) It is possible to use both signal and control data to feed the object, to switch dynamically between several setups (number and position of loudspeakers). It is also possible to use either polar or Cartesian coordinates.	from the library : CICM Tools Format : External Environment : max / msp freeware Max 4.x / 4.5 http://cicm.mshparisnord.org