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midiboxfx_-_midifiying_analog_gear [2007/07/05 10:06]
illogik
midiboxfx_-_midifiying_analog_gear [2021/01/07 13:54] (current)
phatline [External links and resources:]
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 [[http://​www.midibox.org/​forum/​index.php?​topic=6480.0| Analog effects, was "​Midifiying a sega genesis"​]] - it all began here\\ [[http://​www.midibox.org/​forum/​index.php?​topic=6480.0| Analog effects, was "​Midifiying a sega genesis"​]] - it all began here\\
 [[http://​www.midibox.org/​forum/​index.php?​topic=6331.0| Analogue Drum Modules]]\\ [[http://​www.midibox.org/​forum/​index.php?​topic=6331.0| Analogue Drum Modules]]\\
-[[http://www.midibox.org/​forum/index.php?topic=4065.0| midification of an analog filter]]\\ +[[http://​midibox.org/​forums/topic/​4029-midification-of-an-analog-filter| midification of an analog filter]]\\ 
-[[http://www.midibox.org/​forum/index.php?topic=2556.0| Digitally controlled resistors]]\\ +[[http://​midibox.org/​forums/topic/​2539-digitally-controlled-resistors| Digitally controlled resistors]]\\ 
-[[http://www.midibox.org/​forum/index.php?topic=6245.0| converting CV to resistance?​]]\\+[[http://​midibox.org/​forums/topic/​5815-converting-cv-to-resistance| converting CV to resistance?​]]\\
 [[http://​www.midibox.org/​forum/​index.php?​topic=4836.0| Midibox as Switcher advice sought]]\\ ​ [[http://​www.midibox.org/​forum/​index.php?​topic=4836.0| Midibox as Switcher advice sought]]\\ ​
 [[http://​www.midibox.org/​forum/​index.php?​topic=7280.0| PGA Audio Mixer Chip projects]]\\ [[http://​www.midibox.org/​forum/​index.php?​topic=7280.0| PGA Audio Mixer Chip projects]]\\
 [[http://​www.midibox.org/​forum/​index.php?​topic=6061.0| MB MicroMixer - A Simple MIDI Controlled Audio Mixer]] - includes links to other mixer proposals and useful components\\ [[http://​www.midibox.org/​forum/​index.php?​topic=6061.0| MB MicroMixer - A Simple MIDI Controlled Audio Mixer]] - includes links to other mixer proposals and useful components\\
- 
- 
  
 ==== External links and resources: ==== ==== External links and resources: ====
 +FIXME MOST OF THE LINKS ARE DEAD! 
 +here is fixed one: [[http://​www.bernacomp.com/​elec/​og2/​og3_echo.html|OG3Echo-Vactrols...]]\\
 [[http://​en.wikipedia.org/​wiki/​CV/​Gate|CV/​Gate]] - start here if you're new to all this stuff. ​ Also links to articles on DIN sync and Roland DCB (wikipedia)\\ [[http://​en.wikipedia.org/​wiki/​CV/​Gate|CV/​Gate]] - start here if you're new to all this stuff. ​ Also links to articles on DIN sync and Roland DCB (wikipedia)\\
 [[http://​rubidium.dyndns.org/​cag/​| CAG: Cloned Analog Gear]] - mostly synth, some FX, voltage controlled resistors, ADSR etc.  Collection of projects from electronics mags as PDFs\\ [[http://​rubidium.dyndns.org/​cag/​| CAG: Cloned Analog Gear]] - mostly synth, some FX, voltage controlled resistors, ADSR etc.  Collection of projects from electronics mags as PDFs\\
 +[[http://​www.flickr.com/​photos/​11165691@N03/​tags/​|Mike Peake'​s Schematics]] - lots of good stuff\\
 [[http://​yusynth.net/​Modular/​modular.html| YuSynth Modular]] - personal project site with full schematics, PCB and component layouts, parts list for modern components. ​ Cloned filters from the MiniMoog, Steiner, ARP, EMS; LFOs, envelopes, wavefolder distortion, mixers etc\\ [[http://​yusynth.net/​Modular/​modular.html| YuSynth Modular]] - personal project site with full schematics, PCB and component layouts, parts list for modern components. ​ Cloned filters from the MiniMoog, Steiner, ARP, EMS; LFOs, envelopes, wavefolder distortion, mixers etc\\
 [[http://​www.bridechamber.com/​| Bridechamber DIY]] - diy site offering a small&​cheap VCR pcb/​schematic using vactrols\\ [[http://​www.bridechamber.com/​| Bridechamber DIY]] - diy site offering a small&​cheap VCR pcb/​schematic using vactrols\\
 [[http://​highlyliquid.com//​| Higly Liquid]] -MIDI Kits, Circuit Bending, Custom Electronic Instruments,​ checkout the MPA MIDI Decoder; 4 x potentiometer output and 8 x logic output controlled by midi\\ [[http://​highlyliquid.com//​| Higly Liquid]] -MIDI Kits, Circuit Bending, Custom Electronic Instruments,​ checkout the MPA MIDI Decoder; 4 x potentiometer output and 8 x logic output controlled by midi\\
 [[http://​www.tomwiltshire.co.uk/​sdiy/​index.html|VC LFO and ADSR on PIC 16s]] - cloning analogue LFO and ADSR with PICs.\\ [[http://​www.tomwiltshire.co.uk/​sdiy/​index.html|VC LFO and ADSR on PIC 16s]] - cloning analogue LFO and ADSR with PICs.\\
 +[[http://​www.recproaudio.com/​diy_pro_audio/​index.htm|C A Y O C O S T A]] -  schematics, wiring layouts, parts lists, chassis templates, photos and mp3 samples related to building your own classic recording studio equipment\\
 +[[http://​paia.com/​| PAiA]] - Famous maker of reasonably priced kit modulars, filters, rack/desk synths, theremins, MIDI controllers,​ FX\\
 +[[http://​www.thatcorp.com/​appnotes.html| THAT Corp Application and Design Notes]] - a wealth of schematics\\
 +[[http://​www.musicfromouterspace.com/​analogsynth.php?​page=ANALOG| Music From Outer Space]] - synth DIY site with many fully documented designs and PCBs for sale.  Home of the famous [[http://​www.musicfromouterspace.com/​analogsynth/​SOUNDLABMINISYNTH/​soundlab.html| Sound Lab Mini Synth]]\\
  
 ===== Midifying Pots, Resistors and other Tunable Controls ===== ===== Midifying Pots, Resistors and other Tunable Controls =====
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 If you want to build the delay, I’ve made a sketchy but working PCB design for it in Eagle *.brd format, which I will post later this week. //any news? DrB// If you want to build the delay, I’ve made a sketchy but working PCB design for it in Eagle *.brd format, which I will post later this week. //any news? DrB//
  
-[[http://​home.wanadoo.nl/​marcel01011/​diyfiles/​VCR/​delayvactrolscl.jpg|{{http://​home.wanadoo.nl/​marcel01011/​diyfiles/​VCR/​delayvactrolscl.jpg?​300}}]]//Click for full size//+{{midiboxfx:​delayvactrolscl.jpg?​300x*}}//Click for full size//
  
 _About the schematic:_ _About the schematic:_
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 This circuit (thanks jaicen) is from [[http://​www.hoohahrecords.com/​resfreq/​index.html| resonant frequency]] - a nice DIY synth/gear mod site.   ​It’s one of the mods on a Boss DR-110 to make a parameter voltage controlled. This circuit (thanks jaicen) is from [[http://​www.hoohahrecords.com/​resfreq/​index.html| resonant frequency]] - a nice DIY synth/gear mod site.   ​It’s one of the mods on a Boss DR-110 to make a parameter voltage controlled.
  
-[[http://​home.wanadoo.nl/​marcel01011/​diyfiles/​VCR/​FETscl.jpg|{{http://​home.wanadoo.nl/​marcel01011/​diyfiles/​VCR/​FETscl.jpg?200}}]]//Click for full size//+{{midiboxfx:fetscl.jpg?200x*}}//Click for full size//
  
 _About the schematic:_ _About the schematic:_
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 VCR with one end that must be attached to ground (uses half the IC) VCR with one end that must be attached to ground (uses half the IC)
  
-[[http://​home.wanadoo.nl/​marcel01011/​diyfiles/​VCR/​OTAsingle2.jpg|{{http://​home.wanadoo.nl/​marcel01011/​diyfiles/​VCR/​OTAsingle2.jpg?300}}]]//Click for full size//+{{midiboxfx:otasingle2.jpg?200x*}}//Click for full size//
  
 “Floating"​ VCR: both sides of VCR are free “Floating"​ VCR: both sides of VCR are free
  
-[[http://​home.wanadoo.nl/​marcel01011/​diyfiles/​VCR/​OTAdouble2.jpg|{{http://​home.wanadoo.nl/​marcel01011/​diyfiles/​VCR/​OTAdouble2.jpg?300}}]]//Click for full size//+{{midiboxfx:otadouble2.jpg?300x*}}//Click for full size//
  
 //A floating VCR where each “end” of the “resistor” may be at any voltage within the output voltage range of the LM13700.// //A floating VCR where each “end” of the “resistor” may be at any voltage within the output voltage range of the LM13700.//
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 An advantage of this method is substituting for resistors in-circuit where a digital resistor of matching value is not available, or where voltages and currents would be higher than they are rated for. An advantage of this method is substituting for resistors in-circuit where a digital resistor of matching value is not available, or where voltages and currents would be higher than they are rated for.
 +
 +==== Digital: ​ Digital capacitors ====
 +
 +I'll let [[http://​afrotechmods.com/​cheap/​capacitor/​digitalcapacitor.htm| Afroman]] do the talking, but a couple of stolen JPEGs should give you the general idea.  He extends the principle to the construction of digitally controlled LC filters and oscillators.
 +
 +{{http://​afrotechmods.com/​cheap/​capacitor/​TristateDiagram.gif?​600}}{{http://​afrotechmods.com/​cheap/​capacitor/​2bitdigicap.gif}}Repeat to desired bitwidth\\
 +
 +
 +
 +
  
 ==== Mechanical: Motorized pots ==== ==== Mechanical: Motorized pots ====
  
-Motorpots attached to analog pots - This way uses motorised ​pots or rotary motorfaders (depending on what you want to call them) to move analog pots like a servo.+Motorpots attached to analog pots - This way uses motorized ​pots or rotary motorfaders (depending on what you want to call them) to move analog pots like a servo.
  
 It is completely noiseless because the MB and FX circuits are electrically isolated and only coupled mechanically,​ but could be expensive, as motorpots aren't cheap, and it could also be harder to do mechanically. This way would mean that the price would vary depending on how many knobs you need but we would need the additional MF module for this.  It is completely noiseless because the MB and FX circuits are electrically isolated and only coupled mechanically,​ but could be expensive, as motorpots aren't cheap, and it could also be harder to do mechanically. This way would mean that the price would vary depending on how many knobs you need but we would need the additional MF module for this. 
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 The channel switching is performed via a serial digital control (which can accommodate daisy-chaining of several devices) or via a parallel control, allowing updating of an individual output without reprogramming the entire array.// The channel switching is performed via a serial digital control (which can accommodate daisy-chaining of several devices) or via a parallel control, allowing updating of an individual output without reprogramming the entire array.//
  
-it's quite expenisve ​but if this works it will open up a lot of possibilities+it's quite expensive ​but if this works it will open up a lot of possibilities
  
  
-**ANYONE WITH SUGGESTIONS,​ IDEAS, QUESTIONS OR WHATEVER CONCERNING THE CREATION OF DIGITAL CONTROLLED ANALOG HYBRID MONSTER MACHINES: CONTACT/PM ME(ILLOGIK ON MIDIBOXFORUM)! I LOVE TALKING ​ABOUOT ​THIS STUFF, AND WHO KNOWS WHAT OUR FORCES COMBINED COULD DO!** +**ANYONE WITH SUGGESTIONS,​ IDEAS, QUESTIONS OR WHATEVER CONCERNING THE CREATION OF DIGITAL CONTROLLED ANALOG HYBRID MONSTER MACHINES: CONTACT/PM ME(ILLOGIK ON MIDIBOXFORUM)! I LOVE TALKING ​ABOUT THIS STUFF, AND WHO KNOWS WHAT OUR FORCES COMBINED COULD DO!** 
midiboxfx_-_midifiying_analog_gear.1183630016.txt.gz · Last modified: 2007/09/30 22:10 (external edit)