4M particles reacting Music – Real Time FFT using 65536 sample on MP3 stream

Posted on November 3, 2014 by andrea

This is a sound visualization all made on GPU. Using DirectShow.net to grab samples of mp3 audio fille in real-time. Using Cloo GPU accelerated FFT on 65536 Samples in real-time to achieve frequency. Using CUDA to move particles. Movement based on CUDA Smoke Demo mixed with frequency calculated. Call to cuda kernels are made through ManagedCuda. Using DirectX 11 on SharpDX. GPU Used is an Nvidia GTX Titan. FPS slow down based only on the amount of alpha blending not on compute FFT or Cuda Smoke simulation.

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Jetson TK1 Tegra Peformance Test with Nbody

Posted on August 29, 2014 by noumentalia

Unboxing NVIDIA Jetson TK1 Mobile Supercomputer for embedded systems development running the popular Nbody CUDA SDK sample for performance tests with 8192 particles.

Screen recording made with Elgato Game Capture HD. Colors were inverted for white space optic. More information about Jetson TK1 development kit: https://developer.nvidia.com/jetson-tk1

Music: The Misery (Nu and Pauli vs Acid Remix) taken from https://soundcloud.com/electricparadise/ep-podcast-04-tanja-spielvogel

Produced by http://www.noumentalia.de

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Virtual universe simulation with CUDA (nbody)

Posted on May 12, 2014 by andrea

This is a brute force Nbody implementation with ManagedCuda and SharpDX.
It runs on a Geforce Titan at 30fps with 61440 stars. Recorded with NVIDIA ShadowPlay. Particles are bloomed, use of a SkyBox made with SpaceScape.

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AudioSmoke visual remix on surface – CUDA video processing and visualization

Posted on May 4, 2013 by noumentalia

AudioSmoke is a realtime 3D visual computing application for massive particle visualization. This visual remix uses the original video art from AudioSmoke as an input source for the dynamic heightmapping method from the 2 Million Pixel Experiment to obtain a new visual style. This time the visualization is based on a tesselated surface instead of a point cloud.

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AudioSmoke – 3.2M gravity particles in realtime 3D (DirectX + CUDA)

Posted on May 3, 2013 by andrea

AudioSmoke is a realtime 3D visual computing application to visualize millions of particles under different force field conditions. CUDA is used for the parallel computation of the force field model. The particles react on sound input (FFT analysis) and can be explored interactively in 3D space. The video shows 32 million particles under different force fields and parameter settings.

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GPUerror – propagation of error on a GPU revealing colorful structure in volume

Posted on June 14, 2012 by noumentalia

By serendipity this visual computing experiment led to a visualization of colorful structures that evolve from the parallel propagation of errors on a graphics processing unit (GPU). We wanted to transfer color values in subsequent volume slices using an OpenCL kernel. Due to concurrent memory access this transfer operation was erroneous and produced interesting visual patterns in a point-based visualization. Meanwhile we fixed this “error” with another kernel but we wanted to share the initial results as a piece of visual computing art. The visual patterns reveal the structure of block-wise kernel execution on the GPU. Further information on this experiment and code snippets (PDF).

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CUDA Function Animator

Posted on May 2, 2012 by andrea

As a mathematician, I wanted to do this experiment with CUDA. Fascinated by function studies, I made an application that plots mathematical function into 3D. For animation purposes the values for a constant K are varying over time to explore the family of curves in real-time. The CUDA kernel is compiled dynamically with all parameters and function terms.

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DxParticleSound – FFT Particle Sound Spectrum

Posted on May 2, 2012 by andrea

This experiments deals with music visualization. The goal was to create as many concentric circles with radius and different color that represented a specific musical frequency, from the lowest frequency (radius = 0, color = blue) at the highest frequency (radius=k, color = yellow), each pixel is connected to an element of the vector resulting from the FFT. At the end the alpha and the color were assigned in the CUDA kernel depending on the speed and position. With this, you can watch a fountain of particles reacting to music.

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CUDA experiment III – 2 million pixel

Posted on December 5, 2011 by noumentalia

This CUDA experiment maps a FULL-HD (1920×1080 @ 30 frames per second, MPEG2 compression) video source into 3D space. Each frame is processed in real-time on the GPU using CUDA. Each pixel in a frame (2.073.600 pixels per frame) is scaled by its luminance value and given the original color. The camera flight is realized with a 3D space navigator in real-time. This application is written in C# using DirectX 11, CUDA.NET and DirectShow.NET libraries. Benchmarks: GPU load is about 85% (GTX 260), GPU memory controller load 25%, CPU (i7-920) is at 20%.

The soundtrack is made by Ludwig Berger:
http://ludwigberger.com/

As slashcam.de reports, this application might be utilized for a quality check of video footage, like in a waveform monitor:

http://www.slashcam.de/news/single/Echtzeit-3D-Waveform-Monitor-in-CUDA-8715.html

Interview in the NVIDIA CUDA Newsletter, Nov. 10, 2010
http://www.nvidia.com/content/newsletters/web/CUDA-Week-in-Review-Nov-10-10.html

 

 

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CUDA experiment II – cell grid kernel

Posted on December 4, 2011 by noumentalia

Experimental application in C# using CUDA for parallel computation. The grid is quite small sized, but the GPU does it’s work: 512×512 pixels are computed by a cell formula that calculates the difference between the average neighborhood and the current cell’s value. Kernel time is about 3-4 milliseconds, stressing the GPU (GTX 260) only at 2-4% load. The sound is added from an experiment for generating digital noise.

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CUDA experiment I – sinus kernel

Posted on December 4, 2011 by noumentalia

Experimental application in C# using CUDA for parallel computation. The grid is quite small sized, but the GPU does it’s work: 512×512 pixels are calculated by various sinus functions that use their output as input while cycling through time. Kernel time is about 3-4 milliseconds, stressing the GPU (GTX 260) only at 2-4% load. The sound is added from a similar experiment that uses visually generated sinus patterns.

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