Low Bitrate Listening Test, 32kbps, HE-AAC vs LC-AAC vs Opus (HowTo?) 2017-07-07 21:56:08 What's the correct way to test very low bitrates (for the purpose of low quality music streaming), When it's very easy to ABX the encodings being considered.I want to compare:* Opus @ 32kbps and 40kbps* HE-AAC @ 32kbps and 40kbps* LC-AAC @ 64kbps and 80kbpsNow I have seen a few times in this forum that HE 48kbps ~ LC 64kbps ~ MP3 96kbps . But those posts are old. I think HE has come a long way since then because I find that HE 32kbps is close to Opus 32kbps (opus still sounding better) and WAY better than LC 64kbps.In Summary LC 64kbps sounds low-passed and is missing a lot of the high frequencies. It's the easiest to differ from the original FLAC. But all the other 32kbps samples are quite easy to differ with ABX tests. LC AAC gets noticeably better from 80kbps and above. Which matches the typical recommendation of switching to HE from 80kbps and lower.Just to be clear I'm aware of ABX tests, but I find that particular tests are not ideal for such low bitrates. And I don't know if there is another test that would be more appropriate for such samples.