I don't think that imgur link is a good example. The only opus 128 there is heavily optimized for low latency (5ms frame size). If you remove that optimization,

I don't think that imgur link is a good example. The only opus 128 there is heavily optimized for low latency (5ms frame size). If you remove that optimization, and instead optimize for quality, opus does better than mp3 at the same bitrate. https://www.opus-codec.org/static/comparison/quality.svg https://www.opus-codec.org/static/comparison/quality.svg