> What is the purpose of the A-149-2 I understand how the A-149-1 works,
> but are the Digital Random Voltages necessary and how are they used

hello,

I think we answered this somewhere else in this forum... anyway... tnecessary I dont know,
but they are practical for triggering many things or creating kinda on/off events like for
examples you can use them in combination with A166 logic module (I really like that) to
create random events, if the clock in of the a149-1 is slow you can create very rarely
happening events, the digit voltages can be used to trigger ADSR, switch A150, reset
LFO's, even if a few combine to create rythmical random patterns for VCOs...

its really lots of things to do with these...

Best,

Alexandre