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Electricity / Sparks / Arc Welder Sound Synthesis
MUFF WIGGLER Forum Index -> Production Techniques  
Author Electricity / Sparks / Arc Welder Sound Synthesis
???
Hi!

I tried to record sparks from cut wires. I got shocked and thought that it might not be safe. I'm looking for cues to synthesize those sounds. I would like to get something that sound like gigantic wires sparking 100000000000000V.

Any ideas where to start?
wsy
??? wrote:
Hi!

I tried to record sparks from cut wires. I got shocked and thought that it might not be safe. I'm looking for cues to synthesize those sounds. I would like to get something that sound like gigantic wires sparking 100000000000000V.

Any ideas where to start?


Well, for a big arc welder, you've got a 60 Hz wave that's mostly clipped off and
lowpass filtered (that's the power supply; use 50 Hz if you're in Europe. smile ), plus
a crackling "frying bacon" sound that's the sound of the electrode melting and the
droplets actually shorting the arc several tens of times per second.

Then add some resonances at unrelated frequencies, to map out where the parts
of what you're welding get stimulated into oscillation.

That's where I'd start...

- Bill
Dcramer
Osc sync and or wave folding across the right sweet spots can do it.
???
Thanks for the cues!!! Ok I got a fairly realistic noisy / buzzy electrical background with little sparks going on and moving around. Think huge unstable tranformers in an underground facility.

Now I need the "sparks" but I don't know if this can be synthesized... I'd like to be able to make something close to this sound, but more variations of it:

http://freesound.org/people/Connum/sounds/11709/

I'll post the result later!

w00t
scozbor
??? wrote:

I got shocked and thought that it might not be safe.


You seem to have left out the most interesting part of the story lol
sygor
If you wanna cheat and use recordings, this looks like a good set.

Tonsturm Electricity

I haven't actually got it myself, I'm waiting for a suitable project so I can justify buying it!
Liddlepud
It was a while ago but if I remember correctly I got good electrical sparking sounds by running a saw wave into a HP filter and then modulating the cut off frequency of the filter with noise. I ran that into a VCA which was controlled by an envelope from Maths. The envelope was triggered from a random output of the A-149-2 Digital Random Voltages. I also sent a random voltage from the A-149-1 Quantized/Stored Random Voltages into the decay control input on the maths envelope. It didn't have the same initial thwack that you get when you're arc welding but it got close enough for me and you don't get arc-eye.
Raytracer
Here's my attempt:
[s]https://soundcloud.com/very-angry-mobster/electricity[/s]
Hainbach
I made this patch for Aalto a year back and recorded it for this thread:

http://soundcloud.com/hainbach/high-voltage-synthesis-experiment-with- aalto

Maybe not very realistic but dramatic.
screaming goo yo
Kent
Tesla Coils, baby. Tesla Coils.








???
Heyhey nice!

Here are two attempts, one using only the modular and one with massive. It's not really an arc welder, but it sound like electricity...

https://soundcloud.com/faderunner/electricity

It's hard to make something realistic, but I'm pretty happy with the massive patch Guinness ftw!
mikehenry147
You can get help about it from here
Niamac
This may or may not be related but I’m a blacksmith and my smiddy is over one hundred years old full of old belt driven machines and an inconsistent forge fan.Even the sound of the anvil ringing could provide a wonderful percussive hit. During the long hours spent working away I have often thought of getting myself a wee hand held recorder to take some of these noises and piece them together into something rhythmical. Using my eurorack setup at the moment would be out of the question and I’d probably compose the whole thing on the computer but I’d sure love to try out some smple modules to shape them farther.
jorg
Funny you should ask. Just recently I got a pretty pleasing result on the modular. I mixed a 60Hz sine wave with low-passed white noise. Then I fed that into the gate input of an ADSR. I set the ADSR to short attack and decay, zero sustain and zero release. The output of the ADSR sounds very electrical and arc-ish.

You have to fiddle the mixer settings to get the right blend of noise and hum. When you get it right, each time the mixed waveform crosses the gate threshold of the ADSR, it triggers. The result sounds dangerous and scary. But it isn't. ;-)
kcd06
Quote:
Now I need the "sparks" but I don't know if this can be synthesized


Super-heated metal, if that is the source of a sound, will tend to be a crackle or sizzle, while water and water saturated materials will pop and this can be a source of fire/injury/unwanted excitement. Much of the time in welding, when you hear a popping sound something has gone wrong and a bad weld has been made.

Start your patch, and then plug the live output into your mixer, it'll give you a nasty pop. Not suggesting that you cycle transients from your modular into your monitors out of spite or trying to get you to destroy your equipment or hearing, but with the idea that it is a way of communicating to a listener that something wrong/unpleasant/bad has happened. Less destructive might be to use very old electrical switches (older and crustier the better) that introduce a lot of noise into a signal when cycled.

A approach for a crackle sound might be to mix up a number of mutually antagonistic square waves or HPF a noise source, and use a square-wave signal as a contour profile to cycle an amplifier.
Panason
??? wrote:

I tried to record sparks from cut wires. I got shocked and thought that it might not be safe.


Drunken Homer Simpson
MindMachine
Panason wrote:
??? wrote:

I tried to record sparks from cut wires. I got shocked and thought that it might not be safe.


Drunken Homer Simpson


A common misconception. Eel Power FTW!
barnettuk
If you want loud Arcs you could try a fly back transformer and high voltage capacitor.
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