This story as appeared many different places [via Music thing], but I wanted to make sure you guys didn’t miss out on the fun. sCrAmBlEd? HaCkZ! by Sven K? is an amazing piece of video remixing software. It’s built using C++, Python and PureData. It takes music videos, chops them up by beats and indexes the samples by sound signature in a database. You then beatbox into a microphone to describe the music you want to hear. The software builds the music you want out of the sample database. Sven has put together an excellent video that describes the program and has example performances. It’s a must watch. Get it either directly from his site or watch it on YouTube.
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Laser based listening devices work by bouncing the beam off of a window. Sounds in the room cause minute vibrations in the window. These vibrations modulate the laser beam. The laser beam is then converted back into sound at the receiver. Hack-A-Day reader [Aaron v] decided to build one of these devices. It worked, but needs some improvement. He followed plans found here (Coral CDN cache). I’ve also got a local copy of the receiver schematic since there doesn’t seem to be too many of these projects with decent hosting. Williamson Labs has a good discussion of the problems these systems can run into and more advanced setups like interferometry.