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		<b><a href="../../view/Cinelerra/DolbyProLogicEncoding">DolbyProLogicEncoding</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/DolbyProLogicEncoding?rev=r1.2">r1.2</a> - 21&nbsp;Dec&nbsp;2003 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a>)</div>
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<h3><a name="DolbyProLogicEncoding"> </a> <a class="twikiLink" href="../../view/Cinelerra/DolbyProLogicEncoding">DolbyProLogicEncoding</a> </h3>
<p />
Dolby pro logic is an easy way to output 6 channel audio from a 2 channel soundcard with degraded but useful results. Rudimentary Dolby pro logic encoding can be achieved with clever usage of the effects.
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		<b><a href="../../view/Cinelerra/DolbyProLogicEncoding">DolbyProLogicEncoding</a></b>
		(<a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/DolbyProLogicEncoding?rev=r1.1">r1.1</a> - 19&nbsp;Dec&nbsp;2003 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a>)</div>
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<h3><a name="DolbyProLogicEncoding"> </a> <a class="twikiLink" href="../../view/Cinelerra/DolbyProLogicEncoding">DolbyProLogicEncoding</a> </h3>
<p />
Dolby pro logic is an easy way to output 6 channel audio from a 2 channel soundcard with degraded but useful results. Rudimentary Dolby pro logic encoding can be achieved with clever usage of the effects.
<p />
Create 2 audio tracks with the same audio. Apply invert audio to one track. The signal comes out of the back speakers.
<p />
Create a single audio track with monaural audio of a different source. Center it in the pan control. The signal comes out of the center speaker.
<p />
Create other tracks with different signals and pan them left or right to put signals in the front left or right speaker.
<p />
Finally, if a copy of the signal in the back speakers is desired in any single front speaker, the signal in the back speakers must be delayed by at least 0.05 seconds and a single new track should be created. Pan the new track to orient the signal in the front speakers.
<p />
If the same signal is desired in all the speakers except the center speaker, delay the back speakers by 0.5 seconds and delay either the front left or front right by 0.2 seconds.
<p />
If you want to hear something from the subwoofer, create a new track, select a range, drop a synthesizer effect, and set the frequency below 60 Hz. The subwoofer merely plays anything below around 60Hz.
<p />
Other tricks you can perform to separate the speakers are parametric equalization to play only selected ranges of frequencies through different speakers and lowpass filtering to play signals through the subwoofer. 
<p />
-- <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a> - 19 Dec 2003
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 <span class="twikiSeparator">|</span> <a href="DolbyProLogicEncoding">Diffs</a>  | <a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/DolbyProLogicEncoding?rev=1.2">r1.2</a> | &gt; | <a href="http://www.ftconsult.com/twiki/bin/view/Cinelerra/DolbyProLogicEncoding?rev=1.1">r1.1</a>
 <span class="twikiSeparator">|</span> <a href="http://www.ftconsult.com/twiki/bin/oops/Cinelerra/DolbyProLogicEncoding?template=oopsmore&param1=1.2&param2=1.2">More</a>
</div><div class="twikiTopicInfo"><span class="twikiRevInfo twikiGrayText">Revision r1.1 - 19 Dec 2003 - 00:31 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a><br />
Revision r1.2 - 21 Dec 2003 - 19:49 - <a class="twikiLink" href="../../view/Main/AlexFerrer">AlexFerrer</a></span></div>
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