1st order with 4 channels seems to already provide stereo spacialization
Sure, but higher ambisonics orders give more accuracy.
I'll try out. there are at least 6 sources to spatialize, which means 6x enconding+decoding plugins adding to the patch. I'm assuming these aren't the heaviest processing, but there are already up to 1000 tabplay~ playing sometimes.
(I just want to turn a stereo signal into stereo binaural).
I guess you also want to spatialize the signal in some way? There is no benefit in just "converting" a stereo track to binaural IMO, the stereo image just gets worse...
you're right, a spacialization will be added.
I couldn't also find any documentation on how to control the vst parameters in the website
Just like any other VST plugin. Have a look at the "pd parameter" section in vstplugin~-help.pd
ah, now I found out that the values are scaled between 0 and 1. This makes sense now.
Since I have you here (without abusing), do you know the most adequate formula to convert a xy or xyz (cartesian??) coordinate system to the stereoencoder coordinates (which I assume are polar?)?