Realtime GPU Audio 157
CowboyRobot writes "Two researchers at San Francisco State University has successfully implemented hardware acceleration for realtime audio using graphics processing units (GPUs). 'Suppose you are simulating a metallic plate to generate gong or cymbal-like sounds. By changing the surface area for the same object, you can generate sound corresponding to cymbals or gongs of different sizes. Using the same model, you may also vary the way in which you excite the metallic plate — to generate sounds that result from hitting the plate with a soft mallet, a hard drumstick, or from bowing. By changing these parameters, you may even simulate nonexistent materials or physically impossible geometries or excitation methods. There are various approaches to physical modeling sound synthesis. One such approach, studied extensively by Stefan Bilbao, uses the finite difference approximation to simulate the vibrations of plates and membranes. The finite difference simulation produces realistic and dynamic sounds (examples can be found here). Realtime finite difference-based simulations of large models are typically too computationally-intensive to run on CPUs. In our work, we have implemented finite difference simulations in realtime on GPUs.'"
Re:RESONANCE FREQUENCY (Score:4, Informative)
When will you people LEARRRNNNN???????
Maybe when there is something to learn? Both forms are in common use, including physics textbooks and papers.
resonant frequency n. Physics a frequency at which resonance (of any kind) takes place.
1897 L. Bell Electric Power Transmission x. 393 When the [electrical] oscillations are strongly damped by the presence of iron, the total resonant rise is considerably diminished, but it varies less rapidly as the resonant frequency is departed from.
1934 J. P. Den Hartog Mech. Vibrations ii. 52 The forced frequency coincides exactly with the natural frequency... This important phenomenon is known as ‘resonance’, and the natural frequency is sometimes called also the ‘resonant frequency’.
2001 S. Hawking Universe in Nutshell ii. 52 (caption) Just like the strings on a violin, the strings in string theory support certain vibrational patterns, or resonant frequencies, whose wavelengths fit precisely between the two ends.
Re:RESONANCE FREQUENCY (Score:5, Informative)
I'm an Engineer, and this is the first time in my life I've heard "Resonance" and "Frequency" in that order.
I studied that stuff for a while. Had some tests on it. Read some books on it. Look into it at work.
I'm also a bit of a musician.
I'm not saying you're incorrect -- I've just never heard that phrase before.