[sdiy] Telharmonium motors, perhaps?

[Ken Stone]

>Once you start talking about using a CD disc as the tonewheel, the thought
>of simply burning a CD-R with a distinctive optical pattern comes to mind.
>Would this be possible?

Are tracks on a CD spiral or concentric? I guess concentric would be easier
to read using digital control.
Old laser disk players used concentric rings on the CAV format at least.

>What I have in mind, would rely on a modified CD drive to read the optical
>pattern. It wouldn't try to actually read digital bytes from the disc, but
>simply translate the reflective pattern into a waveform. The speed of the
>motor would be altered to control the pitch. 

Of course, if you want a stable, fast and high precission disk, use a
hard-drive platter/motor.

Ken
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Ken Stone   sasami at hotkey.net.au or sasami at cgs.synth.net
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