This FPGA based build creates an interesting display which reacts to music. [Wancheng’s] Dancing Mandelbrot Set uses an FPGA and some math to generate a controllable fractal display.
The build produces a Mandelbrot Set with colours that are modified by an audio input. The Terasic DE2-115 development board, which hosts a Cyclone IV FPGA, provides all the IO and processing. On the input side, UART or an IR remote can be used to zoom in and out on the display. An audio input maps to the color control, and a VGA output allows for the result to be displayed in real time.
On the FPGA, a custom calculation engine, running at up to 150 MHz, does the math to generate the fractal. A Fast Fourier transform decomposes the audio input into frequencies, which are used to control the colors of the output image.
This build is best explained by watching, so check out the video after the break.
Continue reading “Dancing Mandelbrot Set on a FPGA”
As much as we like a good clean Model M specimen, those curly-corded clicky behemoths are somewhat lacking for certain flavors of gaming. There aren’t any blank keys to override, and there sure isn’t a full-color trackpad that you can write apps for. [Gus] has such a keyboard: the Razer Deathstalker Ultimate which features the SwitchBlade UI. He made himself this sweet audio visualizer for it that extends Winamp visualizations to the Switchblade UI.
[Gus]’s hack is built on the Tiny3D visualization framework. It does what you might expect—reads the visualization values, sets them up for display on the trackpad, and renders them to said trackpad. [Gus] uses some of the 10 programmable keys to change colors on the fly, and the result is pretty awesome. As [Gus] points out, this is just the beginning of what the plugin can do. You’ll need the Razer SDK to get started, and you can get the other ingredients from [Gus]’s repo. Once you’re done with this, you could try auto-dimming your keyboard backlight.
Of course there are demo videos after the jump. Come on.
Continue reading “These Trackpad Winamp Visualizations Really Whip the Llama’s Ass”
[Isaac] sent in his mashup build of a LED cube combined with a graphic EQ meter. The build is fairly simple and from the video we can tell that his build would be a great installation in a dubstep venue. While it’s not the 9x9x9 cube possible with some judicious coding we think it’s a very fitting display for the intended purpose.
Continue reading “Using an LED cube as an audio visualizer”
Sure, you could make it into a web server, but [markie] sent me his Mac SE/30 visualizer. It was inspired by another’s mac mod, but he was kind enough to write up an entire how-to. The audio signal was run directly into the deflection coils on the macs tubes. The mod is so simple, I might have to pick one up just for CRT experimentation.
[The next regular podcast cometh, but It’s delayed by my cold.]