Audio Engineering Considerations for a Modern Mixnet

Modern Mixnets have a unique set of requirements when it comes to processing audio. The bandwidth is scarce, but we expect to use modern devices and have ample processing power. We aim to secure the communication against even sophisticated attacks that come from capturing the metadata, and prioritize tools that are free, open source and written with security in mind. In this unique setting, we present a set of recommendations for implementing codecs, DSPs, and sophisticated noise reduction tools, to deliver either impressive quality at low bandwidth or good quality at impressively low bandwidth.

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