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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
Lunetta in Reaktor
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sizone



Joined: Jun 09, 2009
Posts: 132
Location: Honolulu HI
Audio files: 48

PostPosted: Wed Dec 28, 2011 7:08 am    Post subject: Lunetta in Reaktor
Subject description: Who knew CMOS logic used so many cpu cycles?
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I had an aching urge to cook up some Lunetta action recently, but lack of space and components put a damper on that. I decided instead to break out the copy of Reaktor I bought years ago, when times seemed slightly less bleak, and never used. What better way, I thought, to learn the structure of Reaktor than to hammer out some pseudoCMOS? Here is the result. Not as much fun as wires and potentiometers, but my bedroom is filled with the smell of rosin from throwing together an acoustic guitar mic and that does enough to set the mood.

The ensemble contains two banks of Reaktor mock 40106 oscillators. The built in pulse oscillator sounds appropriately rugged, but needing something triangular for pitch mod I threw in an adjustable triangle/parabola oscillator that kind of breaks the Lunetta spirit (I'm sure it's constructable, but not easily).
There are two each 4051 and 4052 multiplexers. While abstractly identical to the hardware, in practice they switch faster and smoother.
There's a 4071/81/70 sort of logicy thing. NI was kind enough to throw in an inverted out for all of their logic modules so there's also a 4069 in there in spirit. It's set up as 2 2 input OR gates (with 2 NOR outs as well), 1 3 input OR gate (again, with an NOR), 2 2 input and 1 3 input AND gates and 2 2 input XOR gates. Like the multiplexers, this unit is at least some true CMOS in abstract if not practice.
There's a 4027 dual JK flip flop that I had to get from the Reaktor user library. I should probably credit the person who made it but that would require effort.
Finally there's a frequency divider. It's a -bit- like the 4018, but with some cheated functionality.

Hope you all enjoy. I'm open to feedback. This is my first ensemble since...2006 (and even then I never really dug too deep) so mistakes where made and I'm sure there's some hideously sloppy programming lurking in macros. I know the panel looks like garbage, that isn't too high of a priority though. If any one has requests for future modules/features/whatever feel free to ask. I'm going to go through the core tutorial next. After that I should be able to throw together some real counters and dividers and shift registers and whatnot.


Lunetta1.rar
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Reaktor Lunetta ensemble

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reaktorlunetta1.mp3
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JingleJoe



Joined: Nov 10, 2011
Posts: 878
Location: Lancashire, England
Audio files: 14

PostPosted: Wed Dec 28, 2011 8:21 am    Post subject: Re: Lunetta in Reaktor
Subject description: Who knew CMOS logic used so many cpu cycles?
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sizone wrote:
I threw in an adjustable triangle/parabola oscillator that kind of breaks the Lunetta spirit (I'm sure it's constructable, but not easily).

Lies, it's easy!


GDAL two wave oscillator.png
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GDAL two wave oscillator.png


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sizone



Joined: Jun 09, 2009
Posts: 132
Location: Honolulu HI
Audio files: 48

PostPosted: Thu Dec 29, 2011 4:57 am    Post subject: Re: Lunetta in Reaktor
Subject description: Who knew CMOS logic used so many cpu cycles?
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JingleJoe wrote:
sizone wrote:
I threw in an adjustable triangle/parabola oscillator that kind of breaks the Lunetta spirit (I'm sure it's constructable, but not easily).

Lies, it's easy!


Opamp cheat! Also no variable duty cycle and triangle slew. Wink Figure how to get that done with a schmitt trigger and minimal components and then we'll be talkin'.
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JingleJoe



Joined: Nov 10, 2011
Posts: 878
Location: Lancashire, England
Audio files: 14

PostPosted: Thu Dec 29, 2011 6:25 am    Post subject: Re: Lunetta in Reaktor
Subject description: Who knew CMOS logic used so many cpu cycles?
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sizone wrote:
JingleJoe wrote:
sizone wrote:
I threw in an adjustable triangle/parabola oscillator that kind of breaks the Lunetta spirit (I'm sure it's constructable, but not easily).

Lies, it's easy!


Opamp cheat! Also no variable duty cycle and triangle slew. Wink Figure how to get that done with a schmitt trigger and minimal components and then we'll be talkin'.

The op amp is only a buffer, I could have used a transistor too. The lunetta circuit itself generates that triangle but connecting anything with a low input resistance to the capacitor messes everything up.

Also for variable duty cycle of both triangle and square, see attachment.

P.S. sorry for
Posted Image, might have been reduced in size. Click Image to view fullscreen.


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