As a continuation of my previous post (UHJ to B-Format/Quad Transcoder/Decoder) I’ve now made a plug-in that transcodes/encodes from 1st Order B-Format (AmbiX or FuMa) to UHJ. As before, it’s based on Gerzon’s original paper (http://decoy.iki.fi/dsound/ambisonic/motherlode/source/11730.pdf) and also includes what Gerzon calls a PQ meter which is a simple visualisation that can be used to look at matrix systems (as detailed in Pictures of 2-Channel Directional Reproduction Systems, also by Gerzon).
Here’s an animation showing it working with a simple panned sine wave (it gets much more interesting for real recordings/reverberant material!)
Both the encoder and the decoder can be downloaded via the link below:
Reaper JSFX UHJ Encoder/Decoder/Transcoder (17278 downloads )