Rob Hordijk Rungler: Difference between revisions
No edit summary |
m (Text replacement - "From Mod Wiggler wiki" to "From Mod Wiggler Wiki") |
||
| (94 intermediate revisions by 5 users not shown) | |||
| Line 1: | Line 1: | ||
The purpose of the '''Rob Hordijk Rungler''' module is to create short stepped patterns of variable length and speed. One could categorize the circuit somewhere halfway between a plain S&H and a shiftregister-based pseudorandom generator. It needs two frequency sources to work and basically creates a complex interference pattern that can be fed back into the frequency parameters of the driving oscillators to create an unlimited amount of havoc.<ref name="rh">[http://www.electro-music.com/forum/topic-38081.html Benjolin schematics] by Rob Hordijk, electro-music.com forum, Nov. 2014</ref> |
|||
Contact Rob directly for details about his designs: <br> |
|||
rhordijk@xs4all.nl. Rob also has his own subforum at the Electro-Music forum site: |
|||
http://electro-music.com/forum/index.php?f=185 |
|||
The rungler is basically a CMOS shift register clocked by one oscillator and receiving its data input from the other oscillator. The output bits of the shiftregister are used as a binary code 'to do something with'. E.g. in the Benjolin the last 3 stages of the shift register for a 3 bit code that is fed into a 3 bit DA converter. This DA eight level output voltage is fed back to the oscillator frequency control inputs. The output of the DA is the 'rungler CV signal'. To describe the rungler waveform in similar terms as like a sine wave or pulse wave I call it a 'stepped havoc wave'.<ref name="rh" /> |
|||
When the rungler signal is fed back to the frequency parameters of the oscillators it will change the triangle waveforms and pulse widths of the oscillator outputs, making other types of havoc waves, like a 'pulsed havoc wave' and a 'sloped havoc wave'. Note that it is these properties of stepped, sloped and pulsed that are of interest in the waves. (The Dutch composer Jan Boerman formulated an idea in the 1960s about audio signals that are inbetween pitched and unpitched. Havoc waves are probably somewhere in that region, maybe a bit similar to granular synthesis stuff. I haven't really thought deeply about this myself, but Boerman has certainly always been an inspiration to me to try to go into that inbetween territory.)<ref name="rh" /> |
|||
The rungler will try to find a balanced state. In this way it behaves according to principle from Chaos Theory. There seems to be an unlimited amount of possible balanced states and when a balanced state is just slightly disturbed it can be noted that it takes a little time to find the next balanced state, with noticeable bifurcations, etc. Note that a new balanced state is defined by the exact position of the control knobs plus the previous state it was in.<ref name="rh" /> |
|||
== References == |
|||
He uses ssm quad vca chips in most designs. |
|||
{{From Mod Wiggler Wiki|Rob Hordijk Designs}} |
|||
Not sure what model it was but they are new from analog devices. |
|||
{{reflist}} |
|||
== External links == |
|||
I think SSM2164. |
|||
* Rob Hordijk explains the [http://www.youtube.com/watch?v=n_PgJ7BmGR8&list=PLAC347DE38ABA9E8D&index=5 Rungler] at the European Electro Music Event 2012, Mallorca, Spain. |
|||
* [http://www.electro-music.com/forum/topic-38081.html What the $#%$ is a rungler?] by Rob Hordijk |
|||
[[Category:Original Rob Hordijk Design]] |
|||
[[Category:5U modules]] |
|||
- HRM VCO |
|||
The Hordijk vco can morph from waveform to another because it builds up the harmonic content from a sine and cosine waveform. |
|||
You can morph with cv from sine to triangle if i remember right with cv if i remember correctly. |
|||
Witch really sounds nice and the pwm was kinda done like that. |
|||
- Dual Phaser |
|||
385 euro for the dual phaser module. |
|||
It's a nice vcf to and can de waveshaping and ringmod kinda stuff to. |
|||
And it got spreadmodulation! |
|||
Yes it's an OTA phaser (8 pole and 2 in a module) |
|||
Cool is that when nothing patched into phaser 2 the second pahsers goes paralel to phaser 1 with the iput inverted. |
|||
If you give them the same settings you get almost full cancel off the output. |
|||
- Patch Matrix |
|||
The active patchmatrix basicly works like and ems synthi. |
|||
It comes with mono-plugs and some have resistors build in for -6db or -12db reduction off the signal. |
|||
But the cooles part is that every point is basicly an insert and with an insert cable you can patch whatever you like into that point! |
|||
The matrix is buffered |
|||
A little under 500 euro. |
|||
- Dual Envelope Generator |
|||
Latest revision as of 18:09, 24 April 2021
The purpose of the Rob Hordijk Rungler module is to create short stepped patterns of variable length and speed. One could categorize the circuit somewhere halfway between a plain S&H and a shiftregister-based pseudorandom generator. It needs two frequency sources to work and basically creates a complex interference pattern that can be fed back into the frequency parameters of the driving oscillators to create an unlimited amount of havoc.[1]
The rungler is basically a CMOS shift register clocked by one oscillator and receiving its data input from the other oscillator. The output bits of the shiftregister are used as a binary code 'to do something with'. E.g. in the Benjolin the last 3 stages of the shift register for a 3 bit code that is fed into a 3 bit DA converter. This DA eight level output voltage is fed back to the oscillator frequency control inputs. The output of the DA is the 'rungler CV signal'. To describe the rungler waveform in similar terms as like a sine wave or pulse wave I call it a 'stepped havoc wave'.[1]
When the rungler signal is fed back to the frequency parameters of the oscillators it will change the triangle waveforms and pulse widths of the oscillator outputs, making other types of havoc waves, like a 'pulsed havoc wave' and a 'sloped havoc wave'. Note that it is these properties of stepped, sloped and pulsed that are of interest in the waves. (The Dutch composer Jan Boerman formulated an idea in the 1960s about audio signals that are inbetween pitched and unpitched. Havoc waves are probably somewhere in that region, maybe a bit similar to granular synthesis stuff. I haven't really thought deeply about this myself, but Boerman has certainly always been an inspiration to me to try to go into that inbetween territory.)[1]
The rungler will try to find a balanced state. In this way it behaves according to principle from Chaos Theory. There seems to be an unlimited amount of possible balanced states and when a balanced state is just slightly disturbed it can be noted that it takes a little time to find the next balanced state, with noticeable bifurcations, etc. Note that a new balanced state is defined by the exact position of the control knobs plus the previous state it was in.[1]
References
This page uses Creative Commons Licensed content from Mod Wiggler Wiki:Rob Hordijk Designs (View authors).
- ^ a b c d Benjolin schematics by Rob Hordijk, electro-music.com forum, Nov. 2014
External links
- Rob Hordijk explains the Rungler at the European Electro Music Event 2012, Mallorca, Spain.
- What the $#%$ is a rungler? by Rob Hordijk