audio / light frequency matched color organ Answered
Hi there, this is my first time to the forum!
I've been doing some searching, as I would like to build a colour organ but further differentiate b/w audio frequencies and the circuit they trigger. Bascially, I would like to take an audio signal (preferably from a mic) and use it to trigger lights based on musical notes. So basically, every A (...110 Hz, 220 Hz, 440 Hz...) would light up a certain circuit, and on for all 12 notes of the musical scale. Of course, I would not limit the response to only 440 Hz for example but slide it to the edge of the adjacent notes' frequency, with 440 Hz occupying the median.
So, I'm wondering what components are necessary to make this happen. In a recent DIY project I saw there is rough split between 3 frequency ranges (bass, mid, treble). If I were to approach it with the same design concept, I would need (8 octaves for example, at 12 notes each) 96 different circuits to run. I'm not opposed to using a PC with some kind of digital signal processing to take the place of these circuits. Also, I want to run the lights on 120 V power for non-LED lights.
My experience in circuit building is nil, but I've consulted circuitry diagrams before for other reasons, so I'm not totally green. I'm computer savvy but only to a certain extent. Not much programming experience save for a 1st year university course.
I have an analog to digital convertor, but that's it for components.
Once I have the digital signal in, where do I go from there? I'm assuming I will need some kind of software to convert via fourier transform to a frequency domain signal then filter all the frequency ranges from there. I assume I would have a digital out signal to a switching circuit board with 12 outs to control the power supply to the lights.
Can anyone point me in the right direction?