[sdiy] SCI Prophet-T8: individual aftertouch controls?

[WeAreAs1 at aol.com]

In a message dated 11/18/04 1:12:19 PM, pforrest at vemia.co.uk writes:

<< Would it be possible to have individual knobs for the amount of each of the

destinations?  >>

Unfortunately, the T8 does all of its modulation source mixing in software.  
That is, there are no analog signals that get mixed together in hardware 
before being sent to destinations.  For example, if you have a filter enveolpe, an 
LFO, and the keyboard aftertouch all routed to filter cutoff, those three 
modulation signals get summed together in software (along with any other filter 
cutoff control signals, such as the front panel cutoff knob) and then are output 
to the filter simply as one summed voltage.  Indeed, the envelopes and LFO's 
don't even exist in hardware -- they are created by the T8's software, and 
summed digitally.  This, as you may know, is quite different from the Prophet 5, 
which had all hardware modulation sources, and routed and summed all the 
sources together in hardware mixing circuits.  Unless you can rewrite the T8's f
irmware, there won't be a way to have individual control over aftertouch sources 
and depths, especially as in the example you gave in your post.

Michael Bacich