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 Forum index » Instruments and Equipment » Sequencers
Boolean Sequencers
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Inventor
Stream Operator


Joined: Oct 13, 2007
Posts: 5978
Location: San Antonio, Tx, USA
Audio files: 258

PostPosted: Tue Jun 30, 2009 12:00 pm    Post subject: Boolean Sequencers
Subject description: In their various forms... do you use one?
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Hi, when I first started hobbying in music two years ago I had no knowledge of sequencers. Rather than learn about the state of the art, I explored and imagined and came up with a thing I call a Boolean Sequencer. Two years later I have discovered variations of it in older and newer posts on the Lunetta and Klee forums, indicating that a sort of synthesis of ideas is bubbling up. It's like they say, when an idea's time has come lots of people think of it independently.

To make a Boolean Sequencer, what you do is hang some logic off of a binary counter. As the counter counts, the logic produces a sequence of ones and zeros that can be a very pleasing melody, and is typically much more complex than say a step sequencer. I've also done things like adding up the number of sum-of-product terms that are active and using it to control frequency or to step up and down a scale or whatever.

Historically, I feel that the Boolean Sequencer is nothing new. Back in the original days of synthesizers there were counters and logic and it must have been an obvious thing to hook them up together. What might be new in the approach is the use of logic matrices to define the patterns and the different ways that one can control other aspects of the tune like frequency or whatever with the logic, it's sum, or say an R2R ladder of the terms.

So I'm posting to ask for your thoughts on this interesting little sequencer, do you use one or have you heard reference to them elsewhere? I also attached an audio sample of two guitars controlled by a boolean sequencer. I created the sample with both logic matrices having a similar but different pattern on them, so the guitars complement each other nicely - sometimes in synch and sometimes doing their own thing.

Les


_Guitar_Lab_Rock1.mp3
 Description:
A pair of ChucK guitar models controlled by a Boolean Sequencer

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 Filename:  _Guitar_Lab_Rock1.mp3
 Filesize:  5.26 MB
 Downloaded:  318 Time(s)


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BobTheDog



Joined: Feb 28, 2005
Posts: 3830
Location: England
Audio files: 32
G2 patch files: 15

PostPosted: Wed Oct 14, 2009 12:46 pm    Post subject: Reply with quote  Mark this post and the followings unread

Just noticed this post!

Did you post the chuck code for this anywhere?

Cheers

Andy
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Inventor
Stream Operator


Joined: Oct 13, 2007
Posts: 5978
Location: San Antonio, Tx, USA
Audio files: 258

PostPosted: Wed Oct 14, 2009 5:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

BobTheDog wrote:
Just noticed this post!

Did you post the chuck code for this anywhere?

Cheers

Andy


Hey Andy, here is the program that made that song. It only runs on a Mac using miniAudicle. It pops up a zillion windows and it is a very complex program, however it is both a synth and a Boolean Sequencer and it's complexity is configurable with a popup window that appears when you start it. If you would like me to explain more about how it works, I'd be happy to go into detail.

Have fun, Andy!

Les


ChucK_Lab8.ck
 Description:
ChucK Lab!

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 Filename:  ChucK_Lab8.ck
 Filesize:  247.4 KB
 Downloaded:  157 Time(s)


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BobTheDog



Joined: Feb 28, 2005
Posts: 3830
Location: England
Audio files: 32
G2 patch files: 15

PostPosted: Wed Oct 14, 2009 9:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks Les.
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