BionicFX Harnesses Power of Graphics Cards for Audio Processing
Programming uses GPU as Audio Effect Processor
BionicFX announced a technology for music production that turns NVIDIA video cards into audio effects processors. Audio Video Exchange (AVEX) converts digital audio into graphics data, and then performs effect calculations using the 3D architecture of the GPU. The latest video cards from NVIDIA are capable of more than 40 gigaflops of processing power compared to less than 6 gigaflops on Intel and AMD CPUs.
BionicReverb, the first effect to use AVEX, will debut at Winter NAMM Conference in January 2005. BionicReverb is an impulse response reverberation effect that runs as a plug-in inside VST compatible multi-track recording software. The audio effect is generated by combining an impulse response file with digital audio. Impulse response files are created by firing a starter pistol inside a location, such as Carnegie Hall, and recording the echoing sound waves. Combining the two files through mathematical convolution is a CPU intensive process that is reduced by moving expensive calculations onto the GPU.
AVEX works by transforming audio streams into the structure and colors of graphics data. The graphics data is processed on the video card by pixel or fragment shaders that run audio effect algorithms, which read and write to textures in video memory. The final calculations are retrieved from off-screen buffers and decoded into audio.
For more information, visit their web site at www.bionicfx.com.
Published in: Multimedia on 2004-09-06