Wouldn't that large spike be the primary sound rather than the echo?<br><br><div><span class="gmail_quote">On 1/15/06, <b class="gmail_sendername">James Harper</b> <<a href="mailto:james.harper@bendigoit.com.au">james.harper@bendigoit.com.au
</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Here's the graph of the echo coefficients I
grabbed from <span>a</span> x100p card on my asterisk server. If my
interpretation is correct, it shows that most of the echo comes in at about the
28<sup>th</sup> tap, and assuming a sample rate of <span>8000hz</span>,
that would be about 3.5ms.</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Will that tell you the sort of things you
need to know?</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Thanks</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">james</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<div style="border-style: none none none solid; border-color: -moz-use-text-color -moz-use-text-color -moz-use-text-color blue; border-width: medium medium medium 1.5pt; padding: 0cm 0cm 0cm 4pt;">
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<div style="text-align: center;" align="center"><font face="Times New Roman" size="3"><span style="font-size: 12pt;" lang="EN-US">
<hr align="center" size="2" width="100%">
</span></font></div>
<p><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;" lang="EN-US">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;" lang="EN-US">
<a href="mailto:asterisk-users-bounces@lists.digium.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">asterisk-users-bounces@lists.digium.com</a>
[mailto:<a href="mailto:asterisk-users-bounces@lists.digium.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">asterisk-users-bounces@lists.digium.com</a>] <b><span style="font-weight: bold;">On Behalf Of
</span></b>Eric Bishop<br>
<b><span style="font-weight: bold;">Sent:</span></b> Sunday, 15 January 2006
11:06<span class="q"><br>
<b><span style="font-weight: bold;">To:</span></b> Asterisk
Users Mailing List - Non-Commercial Discussion<br></span>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [Asterisk-Users] echo
tail stats</span></font><span lang="EN-US"></span></p>
</div><div><span class="e" id="q_108cb91777f1dcde_3">
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Yes, plese do post it....</span></font></p>
<div>
<p><span><font face="Times New Roman" size="3"><span style="font-size: 12pt;">On 1/15/06, <b><span style="font-weight: bold;">James
Harper</span></b> <<a href="mailto:james.harper@bendigoit.com.au" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">james.harper@bendigoit.com.au</a>>
wrote:</span></font></span> </p>
<div>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">I'm working on some code to be able to preload the echo
cancellers (and obviously dump the data too, which I've already done). I should
have a patch ready tonight or tomorrow.</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">If you are interested I can attach a plot of the coefficients
against time which might tell you the sort of thing you need to know if you
could do it on your data. The image is only an 11k gif… would it be okay to
post it to the list?</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">James</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<div style="border-style: none none none solid; border-color: -moz-use-text-color -moz-use-text-color -moz-use-text-color blue; border-width: medium medium medium 1.5pt; padding: 0cm 0cm 0cm 4pt;">
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<div style="text-align: center;" align="center"><font face="Times New Roman" size="3"><span style="font-size: 12pt;" lang="EN-US">
<hr align="center" size="2" width="100%">
</span></font></div>
<p><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;" lang="EN-US">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;" lang="EN-US">
<a href="mailto:asterisk-users-bounces@lists.digium.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">asterisk-users-bounces@lists.digium.com</a>
[mailto:<a href="mailto:asterisk-users-bounces@lists.digium.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">asterisk-users-bounces@lists.digium.com</a>]
<b><span style="font-weight: bold;">On Behalf Of </span></b>Eric Bishop<br>
<b><span style="font-weight: bold;">Sent:</span></b> Sunday, 15 January 2006
10:11<br>
<b><span style="font-weight: bold;">To:</span></b> Asterisk
Users Mailing List - Non-Commercial Discussion<br>
<b><span style="font-weight: bold;">Subject:</span></b> [Asterisk-Users] echo
tail stats</span></font></p>
</div>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Does
anyone know how to determine the echo tail size (in ms) of a particular call?</span></font></p>
</div>
</div>
<p style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><br>
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