Hard Drive Speakers

Who needs the latest Genelec 7.1.4 system when you have a load of old hard drives which can pretty much do the same thing?! This video shows Spin Doctor, a DIY speaker system built from hard drives, using the HDD actuator coil to act like a voice coil in a traditional speaker, making the read/write arm to vibrate and produce sound. The system plays Second Reality, the legendary demo by Future Crew that won Assembly 1993...

Here's more... 

Four hard drives total, two per stereo channel, with a crossover so different drives reproduce different frequency ranges. 
The platters spin rhythmically using motor controllers triggered by peaks in the audio signal.

The result is a mechanical remix of a demoscene classic.

Second Reality is a landmark PC demo created by the Finnish group Future Crew. Released at the Assembly 1993 demoparty, it is widely considered one of the most influential demos in demoscene history and a defining moment in real-time PC graphics.

More details here: https://blog.innerlogics.com/spin-doctor/ 

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