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Multiband Compression for Ambisonics

Authors Huber, M.
Year 2018
Thesis Type Audio Engineering project
Topic Spatial Audio
Keywords 3D sound, Ambisonics, Higher-Order Ambisonics (HOA), signal processing, Software
Abstract Multiband compressors are known to serve as powerful and handy tools, and are frequently encountered within the mastering processing chain of audio productions. Yet up until now, no such tool existed in the world of multichannel 3D-audio formats like Ambisonics. This may be due to the high number of channels, entailing rather tough computational demands. The goal of this work is to discuss the stages involved in designing a multiband compressor and to relate the findings to a multichannel setting. In particular, crossover filter designs, perfectly reconstructing linear-phase systems, compressor designs and the encompassing computational requirements are reviewed. Additionally, a VST Plug-in has been developed over the course of this project, which has been released as part of the IEM Plug-in suite.
Supervisors Rudrich, D.