The StereoINsid is an enhanced Version of the Sound-Master-Article in the GO64! Issue 9/97.
Now it is directly pluggable to the SID-Socket inside the C64/C128. At this time of development,
youre only be able to use two identically SIDs (Original Sid and the same again), because of the
different Voltages of the SIDs. There will be future releases of this Cartridge some time later...
Original SID's Adress is $D400, the second SID's Adress is $DE00 (Pin 7 on Expansionport) or
$DF00 (Pin10 Ex-port). With the future Version, some other Adresses can be choosen.
You can play 6-channel Sids (with ending: *.mus & *.str) with the Stereo-Sid-Player (c) by
Mark A. Dickenson in 1988, you can also use the MOD-Player V1.1 with Stereo-Amiga-MODs
and you may be able (if you're a musician) to do some stereo-Music by yourself.
Now, the "StereoINsid V1.0" enhances non-stereo-music also! Both SIDs receive the same 
Music-Data and play them simultanously. Because of slightly different Filter-Capacitors used
on the second SID and because of Industrial differencies of the SIDs, it will sound like Stereo!
Very usefull for all musics, which immitate some echo-effects; it really sounds like you're
inside a room (some sort of dolby surround). Use your Headphones to hear all the extras.
If you have a Dolby Surround Amplifier, you won't believe our ears, that this is a C64-Music!
OK, the price for the ready-to-plug-in "StereoINsid V1.0" is about 15 Euro / 15 US$ (+p&p).
(NOT AVAILABLE ANYMORE) 
Some more information of this Cartridge can be obtained at my Homepage:
www.athomebymalte.de.vu (the english-site isn't as good as the german, but I'll work on that!)
If you want to mail directly: <img src="email.gif">
My Handle is "Thunder.Bird", so you can recognise me at Partys (like Vision2003, Vision2004....) ;-))
 

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