This is total BS!

[Inventor]

I just thought of something interesting about that thing that we call the Boolean Sequencer. It turns out that the standard step sequencer such as a baby10 or similar is actually one specific design example of a BS. Or stated another way, the step sequencer is a subset of the set of all boolean sequencers. Here's why:

The step sequencer has a binary counter
The step sequencer has logic on the output of the binary counter
The step sequencer has optional feedback to reset
The step sequencer has an analog network driven by the logic

Those are pretty much the four characteristics of the boolean sequencer. Am i right or am i wrong?

Les

'

[ian-s]

The step sequencer can use a binary counter. Some of the early designs used a chain of flip flops. Modern designs would most probably just use a micro. There must be some designs that use a binary counter/decoder though.

The Korg MS50 had a two stage divider which when patched into the 3 input mixer, along with the rectangle lfo used to clock it, could produce sequences of eight discrete notes. Fun but it never stopped me craving an SQ10

Seems the Korg SQ10 does use a binary counter.

[Inventor]

Oh, I see what you are saying ian, There are many varieties of a step sequencer. I am using the baby10 or baby8 examples in my thinking, however those are but one of many step sequencer types.

So in truth I should refine my statement to say that the baby10, when implemented as a decoded binary counter, is a subset of the set of all boolean sequencers. The step sequencer, however, has many implementations that do not fall into the set of all boolean sequencers.

Thanks for the info, you are always so factual and informative!

Les

[wmonk]

The Baby10 isn't based on a binary counter though, but on a decade counter. You could probably say a decade counter is just a binary counter with some added logic of course
Decimal logic is somewhat different then binary logic of course. Hmmm, gives some thinking.

[Inventor]

Yes, wmonk, that's why i added the phrase "when implemented as a binary counter". The baby10 could be implemented as 10 flip-flops in series with preload or as a binary counter with decode logic. It depends on what the particular IC manufacturer chose to do.

Les

[cbm]

I suppose all that's true, but there are some extremely complex step sequencers that have very sophisticated addressing modes.

Buchla has created sequencers that have probabilistic jumps, probabilistic loops, a wide variety of analog and digital addressing modes, and the ability to generate unique outputs from the same "knob data set" from individual address generators. The 248 Multiple Arbitrary Function Generator (MARF) manual is floating around the web, and makes for some interesting reading.

I haven't read up on it too much, but I bet the Klee has some addressing tricks up its sleeve, as well as the fancy note generation stuff it's known for.

The Genoqs Octopus has a variety of advanced addressing modes.

All of these are so far away from something like the Baby 10 that I'm not sure I see what you're getting at. Perhaps you should define what you think a boolean sequencer is.

[droffset]

I built a 16 step sequencer that uses a binary up/down counter that drives a 16 channel multiplexer with cool options.

http://www.youtube.com/watch?v=rKMGsN4OXYY

It was a Psyingo idea that I adapted.

[Inventor]

cbm, I repeat for clarity, i narrowed the scope of my statement: