Article View: sci.electronics
Article #16250Re: microphone circuit
From: Bill Mayhew
Date: Tue, 05 Jan 1993 14:24
Date: Tue, 05 Jan 1993 14:24
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The last time I watched a piano tuner in action, he used a strobe disc to rough in the tuning. The disc was in in a box with a neon bulb apparently connected to the output of an amplifier. The speed of the disc was also regulated, as the box had a sharp/flat knob, which the turner adjusted slightly sharp, a qualitative adjustment, for the paino's upper registers. He adjusted A 440 with a tuning fork first, then worked up and down form there. Final voicing was done entirely by ear. Given the the complex waveforms that most insturments genreate, the stroboscopic disc is a really handy means for checking frequency. I'd imagine that one could be more hip by replacing the neon bulb (it was a lot bigger than an NE-2H) with an LED array. -- Bill Mayhew NEOUCOM Computer Services Department Rootstown, OH 44272-9995 USA phone: 216-325-2511 wtm@uhura.neoucom.edu (140.220.1.1) 146.580: N8WED
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Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!spool.mu.edu!agate!usenet.ins.cwru.edu!neoucom.edu!wtm From: wtm@uhura.neoucom.edu (Bill Mayhew) Newsgroups: sci.electronics Subject: Re: microphone circuit Message-ID: <1993Jan05.142425.25633@uhura.neoucom.edu> Date: 5 Jan 93 14:24:25 GMT References: <1i9clnINN4kj@cs.tut.fi> Organization: Northeastern Ohio Universities College of Medicine Lines: 19