Doepfer

I refined the patch a bit. If anyone's interested, here's details:

I attenuated and offset the A118 to obtain a random voltage X between 
0 and T (the A150's threshold voltage). The bottom row of A155 knobs 
was also scaled to obtain a probability voltage P, also between 0 and 
T. This was added to the random voltage in a mixer.

For each sequencer step, the X+P voltage is sampled, and the output of 
the S&H is patched to the A150's CV input. The A150 is used to gate 
the A155 triggers.

The triggers are delayed slightly by the A162, in order to give the 
A148 and A150 time to operate. The A162 output is attenuated to avoid 
the A150 bleed-thru bug.

When a probability knob is set fully left, the X+P voltage will always 
be below the A150 switching threshold, and the step will never produce 
a trigger - probability 0%, the same as switching the step OFF.

When a probability knob is set fully right, the X+P voltage will 
always exceed the A150 switching threshold, and the step will always 
produce a trigger - probability 100%, the same as switching the step 
ON.

When a probabiliy knob is set between these two extremes, the X+P 
voltages will be randomly distributed above and below the A150 
switching threshold. Turning the knob more to the right or to the 
left increases or decreases the likelyhood that the switch will close 
to produce a trigger for that step.

Joe

wrote:
> I refined the patch a bit. If anyone's interested, here's details:
> 

excellent!  elegant too.  must try.  (need a 150 though) 

i've been doing a similar trick but cheating by using a probability 
seq in max/msp w midi-out connected to a100.  your  
a100-contained patch will do well for what i've been working on  
(a formula for quasi repetitive sparce and heavy bass lines, 
using 156 as note restrictor), be great to free up max to patch to 
something else for duelling prob counterpoint.  simple and fun!  
duff