[opus] Antw: Re: Impossible two bugs in Opus

Ulrich Windl Ulrich.Windl at rz.uni-regensburg.de
Mon May 27 06:39:49 UTC 2019

>>> Jan Stary <hans at stare.cz> schrieb am 17.11.2018 um 17:03 in Nachricht
<20181117160308.GA83156 at www.stare.cz>:
> On Nov 17 20:37:21, sergeinakamoto at gmail.com wrote:
>> Hello. Me again.
>> Have you tried to encode piano solo?
>> Noticed high bitrate Opus gave?
>> Download FLAC and Opus both files,
>> new link:
>> http://www.filedropper.com/example_3 
>> FLAC full: 1084 kbps;
>> FLAC solo: 465 kbps.
>> with ‑‑bitrate 160:
>> Opus full: 158 kbps;
>> Opus solo: 190 kbps.
> The two recordings are totaly unrelated.
> The fact that it's the same song has nothing to do with it.
> Why would a recording of a solo piano necessarily use
> a smaller bitrate than a recording of a band?

Less music to be heard? ;-)

>> And there's also artefact at 15kHz
>> which wasn't in the original audio.
>> Visible with Spek program.
>> Included also Spek spectrogram PNG file
>> for Opus solo to see the artefacts.
> It is already present in the FLAC file
> (see attached spectrogram, obtained with SoX).

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