Multicodality refers to the use of different symbol systems. In didactic contexts, for example, this is language in combination with images.
The coding of information is not synonymous with the modality or the sensory channel.
Multicodality is a feature of multimedia communication.
Source
Weidenmann, Bernd (2002): “Multicodierung und Multimodalität im Lernprozess.” In: Informationen und Lernen mit Multimedia und Internet. 3rd edition. Weinheim 2002: Beltz. pp. 45–62.