Subject: Re: [stella] Kid Vid Voice Module From: Lee Krueger <resqsoft@xxxxxxxxxxxxx> Date: Tue, 23 Jan 2001 17:34:28 -0800 |
Russell Babylon wrote: > ----- Original Message ----- > From: Kevin Horton <khorton@xxxxxxxxxx> > To: <stella@xxxxxxxxxxx> > Sent: Sunday, January 21, 2001 5:55 AM > Subject: Re: [stella] Kid Vid Voice Module > > > At 19:36 1/19/01 +0100, you wrote: > > >At 18.58 17/01/01 -0500, Russell Babylon wrote: > > > > > >>The Kid Vid module was a pretty slick way to add voice and music to > Atari > > >>games in the early 80's. Each tape apparently had a preamble portion > > >>that had a sequence of high pitched tones that were filtered out by the > > >>Kid Vid Module and then sent in binary form to the 2600. From this > > >>information the 2600 could determine which game on the cartridge it was > > >>supposed to play and then start it. Once the game was under way the > tape > > >>player was under program control from the 2600. > > > > Actually, the tapes are in stereo. The "program audio" is on one channel, > > and the feeps are on the other. Remember too that the tape player is NOT > a > > standard model and has been highly specialized for this. One could > easily > > make a "cue file" for the 2600 emulator that would simulate the feeps in > > order. this could allow one to "emulate" the preamble and other > > things. (heh, someone could go as far to put text in the cue file that > > would be printed instead of the audio :-) > > If the tapes are in stereo then why do I hear the feeps very distinctly when > playing the tapes on a non Kid Vid Player? I assume the channel separation > is not that poor. I remember the old Worlds of Wonder Teddy Ruskin (which I > believe was founded by Nolan Bushnell) used this technique but you could not > hear the program information for the robotics unless you played the tape on > a stereo tape player and listened to the other channel. I think the tapes > may have the "feeps" recorded along with the audio information and then have > the Kid Vid extract them using a high pass filter. This is just my gut > feeling from playing with the Kid Vid for a couple of weeks. > > Russ Babylon They are in stereo. I know Echkard and John Saegar are working diligently to make this work on z26 ;-) Echkard should be able to give more tech specs about them as he figures a way to emulate them. -Lee -- ResQsoft Research & Technology: <http://home.earthlink.net/~resqsoft> Check out the Atari 2600 CD Compilation for play on your Supercharger: <http://home.earthlink.net/~resqsoft/wtw.htm> "No Atari; no fun" <==> "Know Atari; know fun" /|\ __________________________________________________________________ "Save the Whales; Buy the whole set" "On the other hand; you have different fingers" "God, Please protect me from your followers." - Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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