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Path: utzoo!linus!decvax!decwrl!pyramid!amiga!sam
From: sam@amiga.UUCP (Samuel C. Dicker)
Newsgroups: net.micro.amiga
Subject: Re: Amiga Sound INPUT ????
Message-ID: <491@amiga.amiga.UUCP>
Date: Mon, 6-Jan-86 22:27:49 EST
Article-I.D.: amiga.491
Posted: Mon Jan  6 22:27:49 1986
Date-Received: Wed, 8-Jan-86 08:22:34 EST
References: <1013@ecsvax.UUCP>
Reply-To: sam@snidely.UUCP (Samuel C. Dicker)
Distribution: net
Organization: Commodore-Amiga Inc., 983 University Ave #D, Los Gatos CA 95030
Lines: 29

In article <1013@ecsvax.UUCP> mjg@ecsvax.UUCP (Michael Gingell) writes:

>While perusing the hardware manual and marvelling at the weird
>things connected to pins on the Amiga Serial RS232 connector I
>noticed the following:
>
>Pin 15: Audio out of Amiga
>Pin 16: Audio in to Amiga.
>
>Question: Are these pins actually connected to anything, if so what?.
>          Is the Audio out the sum of the two stereo channels or
>          something else entirely.

The audio out on the serial connector has the same signal as the left stereo
output jack (the sum of audio channels 0 and 3).  It is on the serial port
to allow a telephone answering device to speak and play music over the phone
line.

The audio in is mixed with the right stereo channel from the Amiga (the sum
of audio channels 1 and 2) and connected to the right stereo output jack.
It allows you to monitor the output of a telephone answering device on your
stereo or the little speaker in your video monitor (YUK!, the Amiga should
only be connected to your stereo :-) ).

The audio in does no signal processing (such as analog to digital conversion)
other than passing the signal through the anti-aliasing filter (don't ask me
why?).  I hope that no one was misled by the term 'audio in'.

		Sam Dicker (...!decvax!decwrl!pyramid!amiga!sam)