now I tried around a bit and got SPAT to output B-Format. But the channel order is wrong and this should fixed or it should be documented somewhere. In B-Format W is the Omni, X is the front/rear axis, Y the left/right axis and Z the up/down axis.
Another problem is, that the Left/Right axis (Y) in the B-Format is inverted (Left and Right are swapped)
A workaround is to phase invert the Y signal, but it would be nice to see this fixed...
A small issue: if I turn of the Reverb, I still hear the Early Reflections.... Can those also be muted, so we can use SPAT a ambisonic panner? Thanks!