## Random knob movement

Scope and XITE Development

Original topic on PlanetZ: https://forums.scopeusers.com/viewtopic.php?t=4742

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Posted: Thu Mar 21, 2002 10:35 pm
by Spirit
Is it possible to have a button (for example) which when pressed changes the value of several knobs by a random amount up or down ?
I'm trying to get a little project off the ground and need to know whether I can add the "randomiser" button to the layout.
Your wisdom much appreciated.

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Posted: Fri Mar 22, 2002 5:03 pm
by Neutron
I think so. i will try to make sure.

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Posted: Fri Mar 22, 2002 8:10 pm
by Spirit
Thanks Defex. I hope to speak to the developer this week

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Posted: Sat Mar 23, 2002 4:11 am
by castol
if your speaking of the modular, yes. want me to expand upon how? or i could just upload a patch, demonstrating.

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Posted: Sat Mar 23, 2002 4:52 am
by Spirit
Either would be great - maybe an email with just text info ? I won't be doing the 'scoping but I want to include this feature so want to make sure the developer knows what to do. The idea is to have a type of "random seed" button that would set a range of designated knobs (probably about six) to random values each time you press.
thanks

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Posted: Sat Mar 23, 2002 6:45 am
by castol
i insist on posting a patch. i just made one up demonstrating this with random pitch value offsets for 3 sine oscillators.
i had explored into this when i was making a modular patch with 8 sine oscillators. one of my ideas was to try and randomly set all the oscillators each to a different semitone (would have prefered frequency). as it is kinda of laborious tuning 8 sine oscillators. i didn't end up using this idea though, as it would have meant leaving out a simple global transposition of all the sine oscillators. which frankly i found more usefull than randomly setting pitch in semitone increments. i found i could get much better results by breaking out my calculator and dividing and multiplying multiples of base frequencies for each oscillator. varying incrementally each oscillator by some periodic order..up by...
<br>2x, 3x, 4x
<br>3x, 5x, 7x
dividing down, and all kinds of stuff i only marginally understand .....blah, blah, blah.
pitch is the easiest parameter to really gauge a difference in value. but this randomicity can be applied to anything. it would be of some use to limit the range of random values besides the "depth" on the intentioned paramter.
i made a post about using a crossfade module and 2 constant value modules to do this range limiting. it doesn't work entirely how it should though.
i am not sure at this point how to derive random frequencies, but its more than likely possible.
the patch is relatively small, if that is your concern.
i will post it in the modular patches section and write a description of what is going on, there.

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Posted: Sat Mar 23, 2002 7:13 am
by Spirit
Thanks Castol !

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Posted: Sat Mar 23, 2002 7:41 am
by castol
welcome . i like the opportunity to share what i have found, working with the modular.