sixtrak modifying

[ganglion at utxvms.cc.utexas.edu]

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