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Subject: Re: bypassing cassette player?


Author:
Mark Fontana
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Date Posted: 14:12:45 12/25/06 Mon
In reply to: Dave Snowdy 's message, "bypassing cassette player?" on 06:59:30 12/25/06 Mon

You can't skip the cassette deck and hook up an audio signal directly- there's too much signal processing going on inside. The input needed at J2 is a 0-10V square wave of the biphase-modulated data signal. The output from your computer is a <1V sine wave. The cassette deck contains a three-stage op amp circuit to square up the signal while rejecting noise.

For a quick test, I'd recommend putting a CD-to-cassette adapter in the cassette deck and depressing PLAY. Then if it works OK, replace the deck with a <a rel=nofollow target=_blank href="http://www.pianocorder.info/wireless_kit/">Pianocorder Wireless Kit</a> or a direct-connect cable (which I can supply on request and permits connecting any audio device directly to J2 on the playback board).

If you're experienced with electronics, it's also possible to invent your own solution or to inject the audio signal into an appropriate spot within the cassette deck circuitry (if you'd prefer to keep the cassette deck in place). My ready-made solution is offered as a time-saver and for those who don't have the technical skills to safely modify their own Pianocorders.

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Subject Author Date
Re: bypassing cassette player?Dave Snowdy22:23:14 12/25/06 Mon


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