sixtrak modifying

[mariano elizalde]

  If someone has a sixtrak near the city where I am  located now ( Dallas,
TX ) I'll gladly install the individual voice out mod. I made for my now
long gone SC sixtrak  :(   ( I will do it for free ... :)  :)     just to
finish the project I started long ago... ( see my homepage just don't laugh
at it... )

http://www.geocities.com/soho/8047/

thanks......



-----Original Message-----
From: ganglion at utxvms.cc.utexas.edu <ganglion at utxvms.cc.utexas.edu>
To: synth-diy at mailhost.bpa.nl <synth-diy at mailhost.bpa.nl>
Date: Tuesday, April 14, 1998 5:11 PM
Subject: sixtrak modifying


>Karl,
>A few months ago I got this response on a similar query:
>
>
>
>Hello!
>
>> Hello,  ANybody out there ever performed a serious modification on
>> a Sequential Sixtrak?  I came across one on a webpage (which I think
>> is now defunct) that detailed routing the six voices to six separated
>> outputs like the Multitrak works.  Has anybody out there done this?
>
>  You can, BUT! You have to duplicate the muting ckt 6x. The Six-Trak
>
>  tunes itself every 2 minutes or so whenever no one is playing it.
>
>  Whenever it tunes itself, it mutes the audio stage, because it plays
>
>  through ALL the voices at several frequencies at FULL VOLUME and
>
>  WIDE OPEN filter. (sounds like a fax machine gone haywire!)
>
>  Soooo... you have to mute the outputs when it does this - I think
>
>  it would be kind of annoying if it didn't mute.
>
>
>>  Also, more importantly, has anybody figured out a way to modify the
>> Sixtrak in such a way that the oscillators can be defeated allowing
>> for external sounds to be processed through the filter and amp stages?
>
>  You CAN turn off all oscillators - each of the synth chips has a audio in
>
> on it - it can handle only about a volt of input, tho'.
>
>
>                                              Hope this helps!
>
>                                               Duane Balvage
>
>Alright Duane!  Now does anybody out there know what synth chip he's
>talking about and where I can find a pin listing?  That would be cool.
>                                                        -Robb Kunz
>