I've the same problem using the FIXED_POINT version.<br>Platforms: ARM HTC tytn with WM 5.0 and ARM i-mate jasjar WM 5.0<br>The same problem on both devices.<br><br>If you need i could record what i hear on my device.<br>Dividing by 2 worked well for me.<br>Adding the following C++ lines before feeding the encoder with PCM apparently solved the problem:<br><br>void Encoder::normalizeRange(spx_int16_t* audioBuf) <br> { <br> DWORD i; <br> for(i = 0; i < SAMPLES_PER_BLOCK; ++i) <br> *audioBuf++ = (*audioBuf >> 1); // +- 8192<br> } <br><br>Anyway i think this is the dirty solution but at least it works.<br>I can't low the microphone gain on my devices and cannot use AGC since it isn't converted to FIXED_POINT yet, so i've no choice other than that dirty solution.<br>Asking on xda developers, nobody has
found a way to lower the mic gain.<br>Even the OEM is keeping it secret. I'll switch to develop for linux pda as soon<br>as i can.<br><br>Bye.<br><br><b><i>"Coffey, Michael" <mcoffey@avistar.com></i></b> ha scritto:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> <meta name="Generator" content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas:contacts" name="GivenName"> <!--[if !mso]> <style> st1\:*{behavior:url(#default#ieooui) } </style> <![endif]--> <style> <!-- /* Font Definitions */ @font-face {font-family:Verdana; panose-1:2 11 6 4 3 5 4 4 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman";} a:link, span.MsoHyperlink {color:blue; text-decoration:underline;} a:visited,
span.MsoHyperlinkFollowed {color:purple; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-compose; font-family:Verdana; color:windowtext; font-weight:normal; font-style:normal; text-decoration:none none;} @page Section1 {size:8.5in 11.0in; margin:1.0in 1.25in 1.0in 1.25in;} div.Section1 {page:Section1;} --> </style> </o:SmartTagType><div class="Section1"> <div class="MsoNormal"><font face="Verdana" size="2"><span style="font-size: 10pt; font-family: Verdana;">It appears that both the echo canceller and the noise reducer (NR) introduce rather severe clicking artifacts when presented with audio that has slightly overloaded the A/D converters. I am talking about speech that sounds just slightly distorted, due to clipping, when simply played back. If I pass that speech through the echo canceller or the noise reducer, it acquires really loud clicks and/or scratchiness in high amplitude sections.<o:p></o:p></span></font></div> <div
class="MsoNormal"><font face="Verdana" size="2"><span style="font-size: 10pt; font-family: Verdana;"><o:p> </o:p></span></font></div> <div class="MsoNormal"><font face="Verdana" size="2"><span style="font-size: 10pt; font-family: Verdana;">Granted, it would be best if I could avoid any clipping in the first place. A problem, though, is that we can not control end user behavior and it is quite common for them to have their audio settings slightly out of adjustment.<o:p></o:p></span></font></div> <div class="MsoNormal"><font face="Verdana" size="2"><span style="font-size: 10pt; font-family: Verdana;"><o:p> </o:p></span></font></div> <div class="MsoNormal"><font face="Verdana" size="2"><span style="font-size: 10pt; font-family: Verdana;">I’ve found a workaround, which is to divide everything by two before sending it to the AEC or NR.<o:p></o:p></span></font></div> <div class="MsoNormal"><font face="Verdana" size="2"><span style="font-size: 10pt; font-family:
Verdana;"><o:p> </o:p></span></font></div> <div class="MsoNormal"><font face="Verdana" size="2"><span style="font-size: 10pt; font-family: Verdana;">Is this a known problem? Would it be helpful for me to send a couple of .wav files to illustrate?<o:p></o:p></span></font></div> <div class="MsoNormal"><font face="Verdana" size="2"><span style="font-size: 10pt; font-family: Verdana;"><o:p> </o:p></span></font></div> <div class="MsoNormal"><font face="Verdana" size="2"><span style="font-size: 10pt; font-family: Verdana;">Thanks again for the great contributions.<o:p></o:p></span></font></div> <div class="MsoNormal"><font face="Verdana" size="2"><span style="font-size: 10pt; font-family: Verdana;"><o:p> </o:p></span></font></div> <div class="MsoNormal"><font face="Verdana" size="2"><span style="font-size: 10pt; font-family: Verdana;">-<st1:GivenName w:st="on">Michael</st1:GivenName><o:p></o:p></span></font></div> <div class="MsoNormal"><font face="Verdana"
size="2"><span style="font-size: 10pt; font-family: Verdana;"><o:p> </o:p></span></font></div> </div> _______________________________________________<br>Speex-dev mailing list<br>Speex-dev@xiph.org<br>http://lists.xiph.org/mailman/listinfo/speex-dev<br></blockquote><br><p> 
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