Interestingly, results were quite flat starting at 32 kbps, suggesting that listeners did not hear markedimprovements at higher bit rates
Based on our research, we recommend keeping the bit rate of streamsas low as possible, consistent with high audio quality. For the HE‐AAC codec, we believe this balance is achievedat a constant stream rate of 48 kbps
Most providers (mine included) charge for traffic volume. So, when you have less traffic you pay less, so that makes sense.
But I'm only really interested in how it performs against Opus.