[sdiy] "lunetta"/CMOS sound-making equivalents in C Programming???

[dan snazelle]

Often I use counters, Logic, clocks, R2R's , shift registers and flip-flops to make sequencers, CV generators, cheap crazy sounds,etc.


I was wondering what is possible using a micro-controller and C to replicate or expand on some of those techniques to end up with a vocabulary of fun and quick
noisemakers.


for example, a common use for CMOS in sound making is taking a clock, putting it through a  4040 counter (12 bit) or similar, taking the taps, ANDING them with other clocks, 
XORing the result, etc.


So...

1. How can you replicate something like a 4024/4040 in a program (  a counter with multiple outputs/taps	                                                                                                                                                                                                              ?

i think a for loop is a counter, would i just set up a bunch of if statements ?

for (i=0; i<12; i++)

if (i=2)
dacTap1=HIGH;


2.  how can i make a simple divide by 2 in code?


3. what about replicating shift registers?


thanks for ANY IDEAS!!