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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I increase audio latency, seems to be only real way to remove clickies<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""> pd-list-bounces@iem.at [mailto:pd-list-bounces@iem.at]
<b>On Behalf Of </b>Jean-Marie Adrien<br>
<b>Sent:</b> Wednesday, December 07, 2011 5:52 AM<br>
<b>To:</b> pd-list@iem.at<br>
<b>Subject:</b> [PD] Gem and audio, multiprocessors, Mac<o:p></o:p></span></p>
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<p class="MsoNormal">Hi list,<o:p></o:p></p>
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<p class="MsoNormal">Is there a strategy to optimize GEM video processing and real time audio
<u>on a single Mac</u> using pd~ :<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Audio in subprocess or in main process ?<o:p></o:p></p>
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<p class="MsoNormal">Any startup flags ? chmod +s stuff ? <span class="apple-style-span"><span style="font-size:9.0pt">shm settings ?</span></span><o:p></o:p></p>
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<p class="MsoNormal">Run two instances of PD with messages between them ?<o:p></o:p></p>
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<p class="MsoNormal">Subprocess fifo size ?<o:p></o:p></p>
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<p class="MsoNormal">The idea would be to give a priority to sound versus video, if absolutely necessary.<o:p></o:p></p>
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<p class="MsoNormal">Situation :<o:p></o:p></p>
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<p class="MsoNormal">On a single Mac (pro or mini), Gem (pix_video & tracking, ordinary resolution and fps) and real time audio (10 channels, mainly reading from disk), dispatched on four processor cores via pd~. The sound is generated in the subprocess (big
latency 512), the video in the main patch. pd-extended 42.5 osX 10.7 &10.6, gem 93, 92. <o:p></o:p></p>
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<p class="MsoNormal">Problem :<o:p></o:p></p>
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<p class="MsoNormal">Sound is distorted when Gem is rendering, and becomes immediatly perfect when stopping rendering (destroying the gem window).<o:p></o:p></p>
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<p class="MsoNormal">Processors seem ok (each core at 75%).<o:p></o:p></p>
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<p class="MsoNormal">Sticking with this problem for a couple of months, <o:p></o:p></p>
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<p class="MsoNormal">Looked around in archives but didn't find any clear element.<o:p></o:p></p>
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<p class="MsoNormal">Thanks<o:p></o:p></p>
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<p class="MsoNormal">JM<o:p></o:p></p>
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