Hi,
The support for spat v4 is discontinued. I’m sending you a (tentative) patch for b-format to binaural conversion using spat v5. (I hope you can upgrade)
The main limitation (was in v4, and still in v5) is that the B-format (or HOA) stream needs to be decoded over a set of virtual loudspeakers, prior to binauralization. There is yet no support for “direct transcoding” from Ambisonics to binaural (a pity).
The attached patcher is mostly “pedagogical”. Feel free to adapt it to your needs.
Also, have a look at “spat5.tuto-bformat” for additional information.
Best,
T.
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-----------end_max5_patcher-----------