The Floppotron by polish hacker SlieNT is a hugh array of 64 floppy drives, 8 hard disks and two scanners.
It uses the controls as we have seen have it before but the project shines with its mass and build-quality. Also it implements volume control which gives it much more musical possibilities than similar hacks. Percussion-like sounds are realized with salvaged hard drives which are run against the casing to make the percussion “plopp”. Electronically, everything is realized with arduinos, which are wired as one big SPI-Chain to be finally controlled from a desktop computer.
Every device with an electric motor is able to generate a sound. Scanners and floppy drives use stepper motors to move the head with sensors which scans the image or performs read/write operations on a magnetic disk. The sound generated by a motor depends on driving speed. The higher the frequency, the greater the pitch. Hard disks use a magnet and a coil to tilt the head. When voltage is supplied for long enough, the head speeds up and hits the bound making the „drum hit” sound. The disk head coil can also be used as a speaker to play tones or even music, but… that would be too easy and too obvious.