transpan is a software suite developed in collaboration with the “acoustic and cognitive spaces” research team at ircam and the conservatoire national supérieur de musique et de danse de paris. its goals are:
- to overcome the spatial weaknesses of 5.1 multichannel audio (stability, precision of lateral phantom sources)
- to allow 3d-audio sound scene to be played on an 1d-system (two-channel stereophony) or 2D-system (5.1 multichannel)
- to provide simultaneously a 3d-audio rendering for headphones (also known as “binaural rendering”)
one of the main goals of this project is to allow a technology which has been known for a long time, the so-called “crosstalk-cancellation” (also known as “transaural processing”) over binaural signals, first to reach the required level of quality and fineness for professional production applications, and second to allow it to be used with traditional panning and miking techniques. this was achieved through the use of high-resolution binaural filters, the development of a specific equalization method, and through a precise control of the phase responses.
this work has been presented in several international conferences (sfa, aes, semaine du son, tonmeistertagung, icsa) and has been used in many music productions. it is closely related to the bipan project, which is also developed in collaboration with the conservatoire de paris. a part of the research and development was achieved as part of the bili project (“binaural listening”).