Caple C871i Bedienungsanleitung PDF herunterladen (Seite 86)

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Apple II Computer Info

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Path: ns-mx!hobbes.physics.uiowa.edu!zaphod.mps.ohio-

state.edu!caen!nic.umass.edu!risky.ecs.umass.edu!umaecs!wistey

From: [email protected]

Newsgroups: comp.sys.apple2

Subject: Re: Sampling Directly and chip burnout

Message-ID: <[email protected]>

Date: 3 May 92 22:32:33 GMT

References: <[email protected]>

Distribution: usa

Lines: 57

In article <[email protected]>, [email protected]

(John Crane) writes:

> Hello Apple II Users !!!!!!!!!

Hello !!!!!!! :-)

> Here is my question ...... Has anyone out there who has been successful at

> doing sampling without additional hardware tell me how you did it so that

> i dont damage my machine

"Sampling directly" is a good way to blow your Ensoniq chip. (I know: $25

labor, $25+ chip.) Yes, it's possible, and it works for a while, but the

chip wasn't designed for that.

If you don't mind putting together a few parts, you can build your own

adapter, though (explanation follows):

Analog

In ---------------+------------+----+----------||------ >>

| | | 10-500 microfarad

-+- -+- + capacitor To CD player,

5V Zener /_\ Signal /_\ = 1.5V Battery microphone,

diode | Diode | - etc.

GS | | |

Ground -------------+------------+----+------------------ >>

I don't remember the pin connections for Analog In and Ground on the 7-pin

sound connector in the GS. Others have probably posted them. If not, write

back and I'll look inside mine.

The Ensoniq is designed to handle 0 to +2.5 Volts. Most tape and CD players

produce an output from, say, -1 to +1 volts. (Or -5 to +5 if you turn it up.)

So the battery boosts this up to within the right range for the IIgs. The

5V Zener gives protection against brief voltage spikes, like sudden loud

noises from the microphone. The signal diode gives protection from the other

end, when the microphone is trying to drive negative voltages (from

excessively loud noises). To test this, use AudioZap, HyperStudio, or some

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 86 of 572

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