menu
Wwise
arrow_drop_down
Strata
arrow_drop_down
Solutions
arrow_drop_down
Apprendre
arrow_drop_down
Communauté
arrow_drop_down
Documentation
arrow_drop_down
Aide
arrow_drop_down
2024.1.5.8803
2023.1.13.8732
2022.1.19.8584
2021.1.14.8108
2019.2.15.7667
2019.1.11.7296
2018.1.11.6987
2017.2.10.6745
2017.1.9.6501
2016.2.6.6153
2015.1.9.5624
The two primary component ordering formats for ambisonics are Furse-Malham, commonly called FuMa, and Ambisonics Channel Number, commonly called ACN. As seen in the following image, the former uses a lettered notation that - following alphabetical order per grouping - starts with the W (omni) channel, moves to its lower right, then its lower left, and then its lower center; then it moves to the next order and starts at the R, moves to its right, then to its left, then the further right, then the further left; then it moves to the next order and follows a similar pattern. On the other hand, the latter is numbered in a much easier to follow left-to-right order.
From the mono top block to the 1st, 2nd, and 3rd order bases, the image also illustrates that each ambisonic order can be viewed as a pyramid with respectively 4, 9, and 16 channels.
![]() |
The ambisonic file's ordering is different within Wwise than its initial import or possible export. Although Wwise expects an imported ambisonic file to use the conventional FuMa ordering, once within Wwise it converts them to the newer ACN ordering with SN3D normalization. However, it keeps FuMa lettering. That is, in the preceding image, the FuMa ordering would be read from left to right, corresponding to W Y Z X V T R S U Q O M K L N P. Meters and the graph view of the authoring tool's Source Editor use this hybrid display of ACN ordering.
This also means that development of custom plug-ins works with the Wwise-converted ACN ordering. Despite this, files recorded with the Wwise Recorder plug-in on an ambisonics-enabled bus use FuMa ordering (thereby producing files that can be imported into Wwise).
Des questions ? Des problèmes ? Besoin de plus d'informations ? Contactez-nous, nous pouvons vous aider !
Visitez notre page d'AideEnregistrez votre projet et nous vous aiderons à démarrer sans aucune obligation !
Partir du bon pied avec Wwise