Hello Antony and Csounders,
from the score is perhaps simpler to interprete the p-fields (see  
above):
p4 and p5 are the coordinates x-y, respectively, of phantom sources: 0  
0 is the origin or dry signal, the couples 1 1, -1 -1, -1 1 and 1 -1  
are at corner, 0 1 is in front etc, 2 2 is a second generation  
reflection, in the right and front side.

p14 and p15 are the dimensions in meters of virtual room, to calculate  
the delay (assuming sound velocity 333m/sec)

p16 is an global volume attenuator, it's better leave to 0.
The pair p6 to p13 are less important, if I remember right they  
emphasize the delay with no changes of room delay. The even one are  
for x coordinates, odd for y.
Note that for a bug in the pan opcode I make the label vai and vay in  
the orchestra; here you have a score fragment as reference, where  
reflections add in fugato-like manner.
i66 0 35.5  0 0  -2 3  3 3  -1 -1      1 -1  92.923 23.731
i66 1 17 1 1 .
i. . .	-1 1
i. 4.0 17.9 1 -1
i. . . -1 -1
i. 2.6 .4 2 2

greetings
Giovanni
PS Do you know if ambisonics or babo models control the direction of  
early reflections in quadraphonic plane? this simply (and not well  
reordered ) instument makes that, and can also be converted for moving  
quadraphonic sources.


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