Download video: Home built mechanical sound recorder
Channel: Maksim Holtzman
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By now, the system records sound files played on computer, in real time. The files are "anti-RIAA" equalized. For further bass attenuation, 2u2 bipolar capacitor is connected in series with the cutting head. I hope to build some analog anti-riaa filter and to use it as regular voice or music recorder.
The cutting head includes a powerful all-range speaker. The speaker drives the lightweight aluminum arm to which the "indenting" stylus is attached.
The mechanism which moves the cutting head is just a CD player's tracking device:)