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Old 05-28-2020, 02:53 PM   #28
Quoth
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Quote:
Originally Posted by binaryhermit View Post
Actually, mp3 can be 8khz, 11.025khz, 12khz,16khz,22.05khz,32khz,44.1khz, or 48khz.
Usually 44.1khz since most mp3s are sourced from CDs or files meant to be put on CDs (and using 48khz theoretically might provide lesser quality due to the encoder's psychoacoustics being tuned for 44.1khz, emphasis on might)
Opus, on the other hand, only does 48khz for the reasons you say.
Yes, I wasn't clear. I didn't mean that MP3 was only 48 KHz sampling. You could argue that actually 128K bps 12kHz speech is much better than 32k bps 48 kHz sampled, if it's properly downsampled before encoding. Actual capture uses high sample rates, higher than the nyquist limit so as to allow simpler filters. Or indeed a filter that's achievable with analogue parts.
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