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can you use audio to manipulate video?
MUFF WIGGLER Forum Index -> Video Synthesis  
Author can you use audio to manipulate video?
kebab
i put audio signal from a mixer and in insert in my videomixer wj-mx10 but i'm not satisfy...it's hard to make vertical lines! how i can?
FetidEye
check out the Gieskes OSCope.
kebab
i know that,but i mean a diy solution
FetidEye
he has diy kits too.

but if you just input audio, you will get lines. you need very high frequencies for interesting shapes / colors. An oldskool tone generator can work pretty good.
it is possible to get diagonal lines. and some colors.
if you can make a sync generator (look for arduino sync) it will become more stable.
jimboburgess
You need to oscillate at a very high speed to create vertical lines.

https://www.lzxindustries.net/system/using-audio-synths-for-video/

"In a video synthesizer, signals from the vertical frequency range (~30 Hz to ~15KHz) are used to modify signals in the horizontal frequency range (~15 KHz to ~6 MHz) to create patterns and shapes. Signals in the animation frequency range (less than the video frame rate, ~30 Hz) modify signals in the upper two frequency ranges to create motion. In order to create a a two dimensional pattern or shape on the screen, you need both a Horizontal signal generator and a Vertical signal generator in your patch. To put this shape into motion, changing or moving across multiple frames of video, you also need an Animation signal generator."
daecosomoxi
kebab
I've been able to on my 3trinsRGB1c+ there's 3.5mm inputs that receive either Audio or CV and I've been able to lightly manipulate. I'm still experimenting, I know all the LZX stuff is great for that and they have a patch or breakout for the 3trinsRGB1c.
Marizu
You can make an oscillator that does vertical lines from something like a PLL 4046 ic.
This can be synced to the horizontal sync signal. Without syncing your oscillator to the horizontal sync signal, it will be difficult to make steady vertical lines.
Dirty_Bill
XR2206 function generators and VCOs will also get into the low mHZ range.
JakoGreyshire
I heard that the Sinc Iter from noise engineering will make vertical lines...It has a huge octave range....huge...
Rien
Hey, thought this might fit in this topic, do you guys have experience running video signal through audio fx equipment? I have a Zoom Studio 1204 lying around here and i've been trying to get it to work with video. now i'm trying to run the the color lines of a vga signal through it so that the sync does not get messed up but to no avail. Only thing that gets through are horizontal lines which - in retrospect - seem logical as audio manipulation can be done at a much lower rate than video. I want to know if you guys have experience with this or if you guys use audio fx equipment in your video setup.

best regards,
Rien.
JakoGreyshire
Rien wrote:
Hey, thought this might fit in this topic, do you guys have experience running video signal through audio fx equipment? I have a Zoom Studio 1204 lying around here and i've been trying to get it to work with video. now i'm trying to run the the color lines of a vga signal through it so that the sync does not get messed up but to no avail. Only thing that gets through are horizontal lines which - in retrospect - seem logical as audio manipulation can be done at a much lower rate than video. I want to know if you guys have experience with this or if you guys use audio fx equipment in your video setup.

best regards,
Rien.


Welcome to Muffs Rien..

As you said, audio is done at a lower rate than video.. So what you are trying could only be done with some sort of conversion.. audio is in the Hz range and Video is in the MHz ranges... I think... I really shouldn't be in the video subforums here because I only dream of having a video modular at this point... Some day I'll get some LZX stuff...

If I recall correctly... Audio at the upper frequencies can affect video in horizontal lines but it takes a lot higher frequencies to get vertical lines...

To use an audio effects unit for video would not work in theory because it's only capable to process and affect the frequency range that it was designed for... However, I don't know much on the subject... Maybe someone else can recommend a converter or a way that this could be done... I bet Lars has already thought of this aspect before. Not sure if he has implemented anything for this procedure, or created a module to do as such... It would be a good idea for a future module though if not...

I'm excited of the Vidiot to come out!

Good Luck!
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