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 Kyma Forum
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 Pan detection
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| Author | Topic: Pan detection |
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simon smith Member |
posted 19 April 2010 11:22
 
Is there a way to to detect where in the stereo field a sound/or frequency is coming from (ie 40% left) and from that derive a control signal. This may be obvious, if so just point me in the right direction. Many thanks S IP: Logged |
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Phi Curtis Member |
posted 22 April 2010 14:21
Hi Simon, I would put an amplitude follower on each channel, using the same settings for both. Then you could use the proportion of the output of one to the other to drive your control signal. So maybe you could start with something like: (((!AmplitudeR / !AmplitudeL) vmax: 0.01) / 10) clipTo01 The vmax: part is to avoid possibly dividing by 0. If the !AmplitudeR on the right is ten times or more the strength of !AmplitudeL, your controller will go to 1. Vice Versa and it will go toward zero (the clipTo01 keeps it within the bounds of 0 to 1). The problem with this is that if !AmplitudeR = !AmplitudeL, your result would be 0.1, when it should be 0.5. You could fix that by using an into: expression: ((((!AmplitudeR / !AmplitudeL) vmax: 0.01) / 10) clipTo01) into: #({0@0} {0.001@0} {0.1@0.5} {1@1}) I'm traveling and can't try it right now, but it seems like that should get you in the neighborhood. You might have to add some more input/output pairs into the into: expression to even out the response, but I'd do that by trial and error. There are, I'm sure, better ways, but that's what I would try first. Phil [This message has been edited by Phi Curtis (edited 23 April 2010).] IP: Logged |
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simon smith Member |
posted 09 June 2010 01:54
I will indeed try this! Many thanks. S (Sorry for such a delayed response) IP: Logged |
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Lokutus Member |
posted 11 June 2010 08:37
I think it would be easier to take the difference between the two amps, like this one: 0.5 + 0.5 * (!AmplitudeR - !AmplitudeL) Then the result is always between 0 and 1 having 0.5 in the middle. IP: Logged |
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keph Member |
posted 11 June 2010 09:05
Perhaps I missed it or it was an obvious implication, but I recommend the PeakDetector on each channel to get the amp level. The side benefit is that you can further contour the control signal through the use of Attack and Release time smoothing. IP: Logged |
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Phi Curtis Member |
posted 26 June 2010 10:29
quote: Yep, that works too. Leave it for me to think of the most needlessly complicated way. IP: Logged |
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