Re: Why is opus introducing audio that wasn't there?
Reply #9 –
Isn't this the result of Opus CELT band folding?
I guess you can prevent the codec from using that last band by applying a lowpass at or below 16khz.
It works with a lowpass of 15kHz. It doesn't work with anything above that. I wonder why.
I am doing it like this, is there a better way?
sox -G IN.flac -t wav - sinc -15000 | opusenc --bitrate 160 --ignorelength - out.opus