LiquidAudio - Ferrofluid Audio Visualizer - Bring It

LiquidAudio was a course project for ECE362 at Purdue University. It takes in an audio signal from a standard stereo jack and outputs the average amplitude of 5 frequency bands in a pool of ferrofluid.

This video shows LiquidAudio with Cobra Starship's Bring It (Snakes on a Plane) playing.

Category:

Entertainment

Tags:

• ferrofluid
• liquid
• audio
• liquidaudio
• ferro
• fluid
• visualizer
• snakes
• on
• a
• plane

[ltcornflakes]

Ahha! You guys used my favorite song! Great job!

Did you guys just use some hi-lo pass filters to get the signal into a bunch of different parts depending on fq, then have a few electromagnets that are triggered at a certain amplitude?

[thezebov]

The audio comes into a microprocessor, a DFT is performed (not very well), and then the amplitude of 5 frequency bands are output to handwound electromagnets. It takes forever to hand wind electromagnets.

[martha420may]

i would have used dubsteb

[tokejyn]

rather than separating the feeds, you could merge them into a single line out, and possibly pull off an oscilloscope-ish effect...

[monkpkey]

@martha420may yes dubstep all way :)

[morenofreire]

Great job guys!

Do you think you can provide some more info on how you made your electromagnets. If you used a metal core,what kind of core did you use? I'm working on a small project using ferrofluid and I would like to hear from you guys before I start winding my electromagnets.

[cspunisher]

In a computer science class at Texas A&M, my teammate and I are working on a 2 week project, which involves creating the "liquid Audio". We are using an FPGA board to do this. I'll post a video when we are done.

[MrMarcee]

come on people... it's not the ferrofluid that emits the sound. It's just a visualizer. There are 5 electromagnets under the fluid, and it's connected to a small electrinc circuit, that divides the sound to 5 freq. And it looks like this

[superbaggy]

where does ferrofluid sit in speakers? is it between the coil and the cone ? I know it helps keep the speaker together but thats about it.

[Monoffel]

with this you could transform any song into guitar hero "maps"

for every point which pops out it can be a note in a song

[roblanco]

No... fluids dampen sound. That applies to any fluid.

[fossil98]

no

it wouldnt

i suppose you could make another version of it and it would make sound

[cooljulz7]

I was wondering if using the ferrofluid speaker would give a clearer sound then using normal speakers?

[chotukutty]

Discrete Fourier Transform