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I got sick of how all available music-visualization plugins had really poor spectrograms, so I made my own. This is someone playing the piano and singing.  This is tremolo at the end of a guitar solo. Unfortunately glDrawPixels() takes up an ungodly amount of CPU time for some reason; at the size above it's already using 100% of one core. Still trying to find a good way to draw lots of pixels to the screen very fast... It's written in Haskell and uses PortAudio for the backend. For the screenshots above I connected it to the output of Amarok using JACK.
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May 15, 2008 17:44
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Thanks for the suggestions about glDrawPixel alternatives. From my initial look at the GLSL tutorials, synchronizing the scrolling action between my program and the shader sounds difficult so I'll probably try the enormous-stream-of-vertices idea first. I also came across the Wikipedia article on wavelet transforms as an alternative to the Fourier transform, providing better frequency resolution without sacrificing time resolution. "Scalogram" instead of spectrogram. Once I free up some CPU time from drawing this should be a fun area to investigate 
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May 16, 2008 15:39
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SuperFurryAnimal posted:Ooh, walking spiders. I made a halfassed attempt at making exactly what you're working on, during senior year in high school. Except instead of actually thinking about ethology and balance and important things like that, I made an enormous blob of a neural network and hoped that reinforcement learning would solve all my problems  .In the end all my spiders succeeded in doing was curling up their limbs underneath them in a sad attempt to satisfy the minimum-height term of the reward calculations. I'd post a screenshot if it wasn't ugly and embarrassing compared to yours. I'd love to hear more details about the algorithms you used
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Jul 11, 2008 02:57
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 This is a password manager I wrote in C++. I made it because existing password managers (KeePass etc.) store the password database in their own weird format, and I don't want my passwords (and backups) to be unreadable in 10 years. So my password manager uses a GPG-encrypted text file with a passwd-like format (1 entry per line, 4 fields, colon-separated). It also takes great care to ensure that all sensitive info is kept in mlock(2)'ed memory, to prevent swapping to disk. Some password managers forget to do this. I finished all the important features about a week ago. I'm currently busy converting it from FLTK to gtkmm. Once that's done I plan to resume working on the Windows port.
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Jan 12, 2009 02:43
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