[sdiy] Saw vs Triangle Sync

[Jason Proctor]

>If you could sweep between Tricore and Sawcore sync types, that would sound
>very cool, particularly under voltage control.  It would be a very complex
>kind of waveshaping indeed!
>
>(...and now I have no choice but to figure out how to do it...)

ok from the Digisound 80-2 VCO docs --

http://www.synthfool.com/docs/Digisound/Digisound_manuals/80_2.pdf

"soft sync by negative pulses to pin 9 causes the triangle upper peak 
to reverse direction prematurely with the result that the oscillation 
period is an integral multiple of the pulse period. if this input it 
not used blah..."

"pin 6 is used for hard sync and r24, d1, and c9 allow sync from 
rising edges while r25, d2, and c10 allow sync from falling edges. a 
positive sync pulse will cause the triangle wave to reverse direction 
only during the rising portion of the triangle, whereas a negative 
sync pulse will cause direction reversal only during the falling 
portion."

sounds like it's worth getting hold of a 3340 to play with this stuff...