AAC vs. Vorbis 2019-01-31 02:29:12 I did an ABX recently with the killer sample castanets and hi-hat file. I was very surprised that Vorbis, which I have not used in some time (I've been muddling along with LAME for a while, being out of the loop for the past couple of years), outperformed Apple's AAC codec. I use Aoyumi's latest tunings. Both Opus and Vorbis were equally good at 128 kbps, even testing using planarmagnetic and electret headphones. But the ACC was relatively easy to spot 6-7 out of 8 times, repeatedly.I'm 42 and I only hear out to 16 KHz, so my hearing is not perfect. Perhaps Q4 Vorbis is not transparent to everyone?