[PD] simple rgb color organ

Derek Holzer derek at umatic.nl
Mon Apr 13 00:12:34 CEST 2009


Done! Results are attached, with GEM example help patch. Could also be 
useful for controlling PWM dimmer for RGB lights or LEDs.

best!
D.

Derek Holzer wrote:
> I also found this:
> 
> http://www.mail-archive.com/use-revolution@lists.runrev.com/msg17390.html
> 
> Which seems much more useful for the task at hand. But not being much pf 
> a C programmer, it could take me some time converting it into a Pd 
> patch. I'll report back...
> 
> D.
> 
> Claude Heiland-Allen wrote:
>> Derek Holzer wrote:
>>> Hey gang,
>>>
>>> before I go reinventing somebody else's wheel... has anybody written 
>>> something that takes a (sound) frequency in Hz or MIDI note and 
>>> outputs the transposed color in RGB values? Along these lines:
>>>
>>> F#44 = 737 nm(Infrared)
>>> G 44 = 696 nm(Red)
>>> G#44 = 657 nm(Red)
>>> A 44 = 620 nm(Red-Orange)
>>> A#44 = 585 nm(Yellow)
>>> B 44 = 552 nm(Green)
>>> C 45 = 521 nm(Green)
>>> C#45 = 492 nm(Green-Blue)
>>> D 45 = 464 nm(Blue)
>>> D#45 = 438 nm(Violet)
>>> E 45 = 414 nm(Violet)
>>> F 45 = 390 nm(Ultraviolet)
>>>
>>> Or even something that takes the light wavelength in nanometers and 
>>> gives separate RGB values? I'm working on a simple color organ for a 
>>> friend this week.
>>
>> http://www.fourmilab.ch/documents/specrend/
>>
>> Have fun..
>>
> 

-- 
::: derek holzer ::: http://blog.myspace.com/macumbista ::: 
http://www.vimeo.com/macumbista :::
---Oblique Strategy # 131:
"Question the heroic approach"
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