Ambisonics Encoder
An OSX port of Dave Malhams open source bPan ambisonic encoder plugin can also be found on www.gerzonic.net
The Institute for Computermusic and Sound Technology ICST (Zürich) releases Ambisonics Externals for Max/MSP. "ambiencode~" encodes n audio-channels in up to 3rd order ambisonic b-format.
Further Max/MSP externals for Ambisonic encoding are also released by Graham Wakefield.
The eqations for encoding for first, second order can be found on Richard Furse’s page .
Encoding with Csound is quite simple, just use the encoding-equations and
transfer them into a Csound- Orchestra. Richard Fuse has done an example for Csound and the text- driven programme V-Space”. Or try the Ambispace.orc for Csound by Jan Jacob Hofmann.