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<p><span style="white-space: pre-wrap">> Can you please make that sound file available?</span></p>
<p><span style="white-space: pre-wrap">> It is hard to tell without having anything.</span></p>
<p><span style="white-space: pre-wrap">> (50s of sines shouldn't be large.)</span></p>
<blockquote type="cite" cite="mid:ZrMxncThrxRsfFgL@www.stare.cz"><br>
<blockquote type="cite">Okay, the specific sine sweep that I used
was this one. Originally, I was testing the "mid" and the "side"
channel, which is why the first occurrence is in mono and the
second is in inverse mono. To test the low bitrates, I had to
use "--downmix-mono" when running Opusenc, which obviously makes
the second sweep vanish.<br>
<br>
In this particular example, except for the very beginning, I
deliberately altered the instantaneous amplitude proportionally
to sqrt(freq), which makes the overall frequency spectrum flat
even though the frequency is rising exponentially (not
linearly). To do that, I actually convolved two different sine
sweeps, each 25 seconds long, whose combined frequency spectrum
is flat (as another Farina's module can generate the
corresponding inverse signal).<br>
<br>
This is the link (there's a Download button on the webpage):<br>
<a class="moz-txt-link-freetext" href="https://1drv.ms/u/s!Ap_EgwEX00SDhH04THc07uQY2ojv?e=0Ab8Bf">https://1drv.ms/u/s!Ap_EgwEX00SDhH04THc07uQY2ojv?e=0Ab8Bf</a><br>
<br>
Petr<br>
<br>
<br>
<br>
</blockquote>
</blockquote>
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