Why does opus scale down frequency from 22k to 20k ?<br><a href="https://lh5.googleusercontent.com/-DGsEd1ijTBs/UDE3OFVrE5I/AAAAAAAADBo/bFcWQ6I4-Zk/s588/opus_64_test.png">64kbps</a><br><br><a href="https://lh3.googleusercontent.com/-3Wfvq6OPGRw/UDE3OClxEdI/AAAAAAAADBk/vsBJ9Gcd_pU/s589/opus_test.png">128kbps</a><br>
<br><a href="https://lh4.googleusercontent.com/-tfDAtdGM2Aw/UDE3N3mrFJI/AAAAAAAADBg/38weacOnQ7I/s588/opus_192_test.png">192kbps</a><br><br>this action will affect the quality of audio.<br><br><b>Can this feature be disable in future ?</b><br>
<br>And <br><br><b>Can opus add no noise and echo in audio at high kbps </b>(192kbps +) <b>?</b><br>