[sdiy] Optical Pickup

[Matthew Smith]

Quoth Loscha at 2009-02-04 17:46...
> The thing I saw very similar was a dial-tone generator, it made the
> actual tone you heard in your ear as beep beeps and busy signals and
> what-have-you.

Now that Mark has let us know what this particular unit sounds like and
from what you say, I am wondering if an exchange would have had a few of
these units, but with different discs to generate different tones.


-- 
Matthew Smith
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