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General Audio / Re: Can higher bitrates sometimes sound worse than lower ones
Last post by fred-hy -The sample Brand linked is interesting, though the claim that higher the bitrate the worse it sounds isn't entirely correct.
At certain bitrates Opus refrains from trying to encode the noise between ~12 kHz and ~15 kHz, but once bitrate increases above those thresholds it stupidly encodes parts of that frequency range. For example 128 kbps is worse than 150 kbps, and while 256 kbps sounds worse than 150 kbps, 320 kbps is once again better than 150 kbps.
It's not doing a worse job because bitrate increases, it just doesn't seem to understand what it's encoding and sprinkles the extra bits randomly leading to awful artifacting.
Do you have a source for this?