O3A Decoder - FuMa

O3A Decoder - FuMa

Host Support

Host TypeSupport
AAXYes, output mapped to a standard ambisonic (SN3D) stem


Output16FuMa Ambisonic Audio (mapped to standard SN3D ambisonic stems for AAX)


This plugin takes a third order ambisonic mix prepared with these plugins (O3A) and converts it to a third order mix using the FuMa ambisonic convention. The FuMa convention was used in early versions of these plugins (prior to version 2.0) and is an extension of classic First Order Ambisonics.

We have labelled this plugin as a decoder hopefully to make it clear that its output is an external format and no longer compatible with the convention that the rest of these plugins use.

You can convert back using the O3A Injector - FuMa plugin.

In Pro Tools Ultimate, as the FuMa format is not supported directly as a stem format, this plugin outputs audio using the ordinary ambisonic stem format. Normally this should be encoded as O3A (i.e. SN3D/ACN), so we are "misusing" the format here.


This plugin produces third order FuMa output. If you only want first or second order output, just take the first four or nine output channels and ignore the rest.

Alternatively, the O3A Decoder - O1A or O2A plugins can be "misused" to reduce the order of the FuMa material as this is a rare case where a plugin will work correctly for both SN3D and FuMa.

The plugin is available in the O3A Core plugin library.