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<p class="MsoNormal"><span style="color:#1F497D">For some reason the attachment did not go through. Re-attaching.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Mukund Raman
<br>
<b>Sent:</b> Wednesday, April 01, 2015 6:12 PM<br>
<b>To:</b> 'opus@xiph.org'<br>
<b>Subject:</b> Opus multi-stream/surround: Audio corruption on decoded content<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello Everyone,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am using the opus 1.1 multistream APIs to encode a 5.1 surround stream on the server, stream it to client, decode it and capture the pcm data. I noticed that there was severe corruption/attenuation on one of the channels(specifically
Back/Rear Right). This would appear to be the last channel in the stream. I am attaching an image of the PCM dumps from the original and the one decoded on the client which shows the channel corruption. If required I can also provide the source and destination
wav files. The track I am trying to play is purely speech data, however, it has been formatted as Hi-Definition content (16 bit LPCM, 48 KHz). I’d like to add that I have also tried a simple loopback test; where I read from ‘the’ source file encode it, immediately
decode the encoded buffer and write to a output file and I am seeing the same kind of corruption. Since my actual use-case will involve mixed media content, i.e. typically voice and music, I was a bit concerned about this.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If the file purely has music(and no speech), I do notice some attenuation, however, it does not suffer from any distortions.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Following is the code I am using for initializing the opus multi-stream encoder: -<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><code><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><defines and vars><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">#define</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">CHANNELS</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> 6</span><span style="font-size:9.5pt;font-family:Consolas;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">#define</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_SURROUND_MAPPING_FAMILY</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> 1<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">#define</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">SAMPLE_RATE</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> 48000</span><span style="font-size:9.5pt;font-family:Consolas;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">typedef</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">union</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:#2B91AF;background:white;mso-highlight:white">t_SurroundInfo</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">{<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">unsigned</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">char</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> surroundInfo[1];<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">struct</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> {<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">unsigned</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">char</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> channels;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">unsigned</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">char</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> streams;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">unsigned</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">char</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> coupled_streams;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">unsigned</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">char</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> channel_mapping[</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">MAX_SURROUND_CHANNELS</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">];<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> }s;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">}</span><span style="font-size:9.5pt;font-family:Consolas;color:#2B91AF;background:white;mso-highlight:white">SurroundInfo</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">;</span><span style="font-size:9.5pt;font-family:Consolas;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:9.5pt;font-family:Consolas;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"></defines and vars><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><encoder><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> </span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">int</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
streams = 0; </span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">int</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> coupled_streams = 0;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> m_SurroundInfo.s.channels =
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">CHANNELS</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">; // set to 6<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> m_MSEnc = opus_multistream_surround_encoder_create(</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">SAMPLE_RATE</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">,
// SAMPLE_RATE = 48000<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> m_SurroundInfo.s.channels,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_SURROUND_MAPPING_FAMILY</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> &streams,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> &coupled_streams,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> m_SurroundInfo.s.channel_mapping,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_APPLICATION_RESTRICTED_LOWDELAY</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> &err<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> );<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">if</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> (err !=
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_OK</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">)<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">return</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> m_SurroundInfo.s.streams = (</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">unsigned</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">char</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">)streams;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> m_SurroundInfo.s.coupled_streams = (</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">unsigned</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">char</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">)coupled_streams;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> opus_multistream_encoder_ctl(m_MSEnc,
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_SET_BITRATE</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">(</span><span style="font-size:9.5pt;font-family:Consolas;color:gray;background:white;mso-highlight:white">bitRate</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">));<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> opus_multistream_encoder_ctl(m_MSEnc,
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_SET_BANDWIDTH</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">(</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_AUTO</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">));<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> opus_multistream_encoder_ctl(m_MSEnc,
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_SET_VBR</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">(0));<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> opus_multistream_encoder_ctl(m_MSEnc,
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_SET_VBR_CONSTRAINT</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">(0));<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> opus_multistream_encoder_ctl(m_MSEnc,
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_SET_COMPLEXITY</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">(10));<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> opus_multistream_encoder_ctl(m_MSEnc,
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_SET_INBAND_FEC</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">(0));<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> opus_multistream_encoder_ctl(m_MSEnc,
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_SET_FORCE_CHANNELS</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">(</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_AUTO</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">));<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> opus_multistream_encoder_ctl(m_MSEnc,
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_SET_DTX</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">(0));<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> opus_multistream_encoder_ctl(m_MSEnc,
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_SET_PACKET_LOSS_PERC</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">(0));<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> opus_multistream_encoder_ctl(m_MSEnc,
</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">OPUS_SET_FORCE_MODE</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">(</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">MODE_CELT_ONLY</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">));</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"></encoder><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><decoder><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">int</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> streams = (</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">int</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">)m_SurroundInfo.s.streams;
</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">int</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> coupled_streams = (</span><span style="font-size:9.5pt;font-family:Consolas;color:blue;background:white;mso-highlight:white">int</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">)m_SurroundInfo.s.coupled_streams;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> m_MSDec = opus_multistream_decoder_create(</span><span style="font-size:9.5pt;font-family:Consolas;color:#6F008A;background:white;mso-highlight:white">SAMPLE_RATE</span><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white">,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> m_SurroundInfo.s.channels,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> streams,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> coupled_streams,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> m_SurroundInfo.s.channel_mapping,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> &err<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:9.5pt;font-family:Consolas;color:black;background:white;mso-highlight:white"> );</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"></decoder><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal"></code><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’d appreciate it, if someone can shed some light on why the observed phenomenon is occurring. Could it just be that, I am playing a content that only has speech and actually forcing opus mode to CELT?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Warm regards,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Mukund.<o:p></o:p></p>
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