A few months ago, I read a very interesting blog post by Philipp Hancke on how Chrome had added experimental support for audio redundancy via RED, and how it actually helped improve audio quality a lot in lossy networks. That post was followed a few weeks later by another interesting article, written by Boriz Grozev from the Jitsi team, on how RED could be used within an SFU context. I was quite intrigued by both writeups since then, but I only found time to look into this myself recently. This post tries to summarize my efforts in that regard and…