Re: Sound Digitizer

[supertimer@aol.com (Supertimer)]

Frank Carney <frankcNOSPAM@cyberhighway.net> wrote:

>I just picked up a program called HyperStudio.  It has everything except
>for a sound digitizer card.  It is not  plug in the slot type.  It
>connects to a port toward the front of the IIgs next to the speaker
>port.  Does anyone have the pinout of the port the digitizer connects
>to?  I am hoping I can build my own digitizer instead of trying to find
>one.  The program looks cool too.  I think it is similar to Hypercard
>except this is for the IIgs.  Thanks in advance.

Um, actually HyperCard is for the IIGS too.  ;-)

HyperStudio is also for Macs and Windows PCs.

But back to the sound input, here's what David Empson said
about it:

..It is the 7-pin molex connector in the lower right corner of the
..motherboard, next to the Ensoniq.  All stereo cards plug into this
..connector.
..
..Most of the pins are used for sound output and associated demultiplexing.
..Pin 1 is the sound input and pin 2 is analog ground.  (Pin 1 is the one
..closest to the back of the computer, right next to the legend "J25" on the
..ROM 1 motherboard.)
..
..The sound input expects a signal which has a maximum range of 2.5V peak to
..peak.  The input impedance is 3000 ohms.
..
..I'm not all that clear on audio impedances and voltages, so I'm not sure
..if it is safe to connect anything directly to this pin.  It may be
..necessary to use a simple amplifier circuit to handle impedance matching.

BUT, if you like Macintosh HyperCard and are good at
HyperTalk, I strongly urge you to take a look at HyperCard for
the Apple IIGS.  It is almost identical to Mac HyperCard.

HyperStudio is a nice system too.  When you get the hang
of both, it is even possible to have stacks of the two systems
work with each other!