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Stream Operator
Joined: Oct 13, 2007 Posts: 6221 Location: near Austin, Tx, USA
Audio files: 267
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andrewF
Joined: Dec 29, 2006 Posts: 1176 Location: australia
Audio files: 4
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Inventor
Stream Operator
Joined: Oct 13, 2007 Posts: 6221 Location: near Austin, Tx, USA
Audio files: 267
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Posted: Wed Feb 25, 2009 4:04 am Post subject:
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Hi andrewF, that paper sure looks a lot like it, and it was published in 2000 so they got me by eight years! Nothing new under the sun, eh? Well in it's current form the Boolean Sequencer is a little bit more than that because it walks up and down a scale, but yeah that's probably the basic concept right there.
I always knew that this thingie was just an old idea which I had embellished, and now I see that is true. Ah well, it's worth making in hardware for synthesizers anyway. I'll work on a schematic for it soon, but here is a verbal description of the sum of products version.
You start with a binary counter. Say it's an eight bit counter. The bits each go into an AND gate and each AND gate has a SPST switch that sets it's other input to either zero or one. They all go into an eight input OR gate. Then you make some number of those structures, k of them, so that you have k outputs. You then have an adder that adds up how many outputs are one. Add that to a MIDI note and that gives you your frequency.
That's one example of how to do a Boolean Sequencer but there are many other ways, including walking up and down a scale which I do in the above audio sample. I'll try to get a schematic going soon. _________________ "Let's make noise for peace." - Kijjaz |
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fluxmonkey
Joined: Jun 24, 2005 Posts: 708 Location: cleve
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Posted: Wed Feb 25, 2009 7:47 am Post subject:
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great idea, looking forward to more detail. might this also be akin to grant richters hardware neruons?
b _________________ www.fluxmonkey.com |
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Inventor
Stream Operator
Joined: Oct 13, 2007 Posts: 6221 Location: near Austin, Tx, USA
Audio files: 267
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Posted: Wed Feb 25, 2009 2:53 pm Post subject:
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bbob wrote: | great idea, looking forward to more detail. might this also be akin to grant richters hardware neruons?
b |
Hi bbob. It is different from that hardware neuron, though that neuron looks pretty interesting also! This concept is based on truth tables. You have a counter and each sum of products expression produces a truth table entry then you do something interesting with that truth table output. Hope that makes it a little more clear. _________________ "Let's make noise for peace." - Kijjaz |
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Inventor
Stream Operator
Joined: Oct 13, 2007 Posts: 6221 Location: near Austin, Tx, USA
Audio files: 267
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Posted: Sun Feb 28, 2010 10:50 pm Post subject:
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I just googled "Boolean Sequencer" and this old thread from a year ago came up as second on the list, so I thought I would insert a link to the development thread which is here:
http://electro-music.com/forum/topic-36165.html&postorder=asc
If you read that thread (well, skim over it i guess cause it's long), you will find that the project originated as a single board with a Boolean Sequencer and a Karplus Strong circuit. It has since evolved into two boards, one for the Boolean Sequencer and another for the Karplus Strong.
At the time of this writing the Karplus Strong board has been manufactured and tested working, and will hopefully be available for sale soon. The Boolean Sequencer board is still under development and a first run circuit board is planned for later this year.
I hope you enjoy reading about these boards and listening to the music samples and radio shows linked in the development thread. Have fun and enjoy!
Les _________________ "Let's make noise for peace." - Kijjaz |
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Sound
Joined: Jun 06, 2006 Posts: 842
Audio files: 1
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Posted: Wed Mar 03, 2010 1:49 am Post subject:
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Thanks Inventor. I was impressed listening in radio electro-music your boolean sequencer.
I'm interested in. I'll build it. |
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Inventor
Stream Operator
Joined: Oct 13, 2007 Posts: 6221 Location: near Austin, Tx, USA
Audio files: 267
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Posted: Wed Mar 03, 2010 8:53 am Post subject:
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Sound wrote: | Thanks Inventor. I was impressed listening in radio electro-music your boolean sequencer.
I'm interested in. I'll build it. |
Great, I hope you enjoy the project!
Les _________________ "Let's make noise for peace." - Kijjaz |
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