Unwanted feedback

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newtfish
Newbie
Posts:41
Joined:09 Apr 2011 19:32
Unwanted feedback

Post by newtfish » 09 Mar 2014 14:11

Hi,

Ive got two Fader objects (fader1, fader2), which both move each other. I have two scripts in the fader1 object, which enable this (bidirectional)

Script1: On Expression - x

fader2.x = x

Script2: On Expression - fader2.x

x = fader2.x

This enables bidirectional support, so when I move one fader the other moves and vice versa.

However, the problem is that when I send OSC into Fader2, I get feedback (Fader1 sends a signal back) causing an unwanted feedback loop

Is there any way I can stop this loop from happening, so that on OSC, there is no output?

midimockup
Newbie
Posts:41
Joined:08 Nov 2012 15:55

Re: Unwanted feedback

Post by midimockup » 09 Mar 2014 20:55

Yes this is always a problem with bidirectionality. The strategy is to use the "return" command which bypasses a script. Alter your script so that unwanted messages are bypassed.

newtfish
Newbie
Posts:41
Joined:09 Apr 2011 19:32

Re: Unwanted feedback

Post by newtfish » 09 Mar 2014 21:14

Brilliant. Thanks so much for your help :)

Macciza
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Joined:07 Dec 2011 04:57
Location:Sydney, Australia.

Re: Unwanted feedback

Post by Macciza » 10 Mar 2014 01:05

Hi
depending on what you are doing you may be able to use 'Alias's' instead, to duplicate the Faders rather then scripting it ...
Right click Object and Create Alias . ..

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leehu
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Re: Unwanted feedback

Post by leehu » 12 Mar 2014 15:26

I always check the z parameter when dealing with updating multiple controls - not sure quite what you're after here tho...

newtfish
Newbie
Posts:41
Joined:09 Apr 2011 19:32

Re: Unwanted feedback

Post by newtfish » 20 Mar 2014 19:12

just wondering is there any way to do this with a switch? Switches dont seem to have the z parameter so Im a bit stuck

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