Here is one of music-dsp articles (critical date becomes important). http://aulos.calarts.edu/pipermail/music-dsp/2004-May/027009.html Perhaps they read that article, patented and implemented during the summer. I don't know. Juhana == cut == Bill Baldwin wbaldwin at austin.rr.com Sat May 1 15:18:11 PDT 2004 It's definitely possible, but far from convenient or optimal with today's hardware. The h/w is steadily getting better, but you'd likely run into FP precision issues on many cards. The new pixel shader 3.0 h/w is starting to appear and will become more common over the next year - this extends the instruction length of shaders, adds better flow control, and lots of other stuff that increases the potential for doing interesting audio processing. Getting the data in and out is another issue - you could treat an audio channel as a 1-dimensional texture, turn off h/w filtering, etc. - but you'd end up locking resources very frequently to write your input and read back your output, which tends to stall the graphics pipeline and thus slow things down. Still, it's worth exploring given that all that GPU power that your sequencer is ignoring... -Bill -----Original Message----- On Behalf Of vesa norilo Hi all, Has anyone thought about it? I bet someone has. There's plenty of horsepower sitting idle in PCs with modern video cards. The in them shaders are completely programmable, but I don't really know about streaming data to and fro. I just thought that it would be very neat to write a VSTi synth that runs on, say, Radeon X800 or GF6800. Is it possible at all? Vesa http://shoko.calarts.edu/musicdsp http://ceait.calarts.edu/mailman/listinfo/music-dsp == end ==