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Hi, there. 2 years ago, I created this thread on the forum:
<a class="moz-txt-link-freetext" href="http://forum.pdpatchrepo.info/topic/7340/echo-supressor">http://forum.pdpatchrepo.info/topic/7340/echo-supressor</a>. After
talking about dBs, I thought I acchived what I was looking for. But
no. Nor close.<br>
<br>
My last non-replied post on september 2014 says:<br>
<br>
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<div id="content_38129" class="post-content" itemprop="text">
<p><i>Bringing back to life an old thread... I tried to make
this patch work LIVE... and it is not as thought.</i></p>
<p><i>To make this patch work (*1), I should find the perfect
delay to suppress the audio. Using 44100, the delay time can
vary in 0.0226ms. So... it's almost impossible to get that.
I only acchieve a flanger, nothing else.</i></p>
<p><i>In the first Patch-Circle done in Argentina last Saturday,
I talked with Pablo E. Riera about this and he told me about
the adaptive external and the echo cancellation example...
but there is no example like that (only intereference
cancellation).</i></p>
<p><i>I will explain again (*2): the operator has a microphone
(using one channel of input) and it sounds in a LCD (far
away) (using one channel of output). Above the LCD I have a
mic (second channel of input). This mic takes what the
audience says and send to the operator headphones (second
channel of output). The operator hears her own voice (with a
delay). I want to supress this "return". It doesn't matter
the latency, I just don't want the operator to hear her/him
voice.</i></p>
<p><i>I would need something that learn from the first
microphone and get rid of what the second mic takes.</i></p>
<p><i>I hope being clear in my explanation. Thanks in advace.</i></p>
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<i> </i></div>
<br>
(*1): the patch is in the thread. It does something like this: it
takes the microphone (channel one), invert the wave (by using [*~
-1]), it uses a delayline to synch (because of the latency) and mix
with the output. The intention is, obviously, suppress the
microphone after been listened by the second microphone.<br>
<br>
<p><font face="monospace">[adc~]<br>
| \<br>
| [delwrite~ echo-supressor-A 1000]<br>
|<br>
[delwrite~ echo-supressor-B 1000]</font></p>
<font face="monospace">
</font>
<p><font face="monospace"><br>
[Hslider] # to synch. It depends on latency (it would have to be
exact, here is the problem!)<br>
|<br>
[vd~ echo_supressor-A]<br>
|<br>
[*~ -1]<br>
|<br>
| [vd~ echo_supressor-B 1]<br>
| / <br>
</font><font face="monospace"><font face="monospace">
[+~]<br>
|</font><br>
[dac~]</font><br>
</p>
(*2): I just updated the explanation<br>
<br>
How can I acchieve an echo suppresor? Is this possible?<br>
If I'm not clear in my explanation, please tell me. Thanks.<br>
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