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CGS - Ken Stone's Modular Synthesizer

CGS - Ken Stone's Modular Synthesizer
Related:  Synth DIY

Steiner VCF Diode VCF I had never seen the Steiner-Parker's Synthacon as real one. According to Synthmuseum.com, it is monophonic synth which has 3VCO as same as Mini Moog. Its panel structure is very different from Mini Moog. And they say that not only panel configuration but also the sound produced by its VCF is so strange. And there is another documents at SDIY-ARCHIVE about this. The aim of this page is to share the method of this vcf with Japanese DIYer by Japanese under the permission of Ken Stone. Tune I drive this VCF with +/-15V.

Ken Stone's Modular Synthesizer Sub Oscillator for music synthesizers. The sub oscillator was one of the first synthesizer modules I ever built, back around 1980. The first version was designed with the ETI 4600 in mind, and was published as a circuit idea in the Australian edition of ETI. Another circuit I used at the time to "fatten up" the sound of my single oscillator synth was a "harmony generator", achieved by running a 4017 decade counter chip wired to divide by six or divide by three. This design combines both of these circuits, giving a two channel sub oscillator, which allows each channel to be used independantly, or driven from the same oscillator, but set to different intervals. Some ideas on how to use this module: Fed by two VCO's it can operate as two independant sub-oscillators, with optional ring modulated outputs. Running both sub-oscillators from the same VCO, tuned to a fifth over the base note you require, and with the prescaller set to divide by 3, it is possible to create harmonies. Parts list Notes:

Mutable Instruments The OP-AMP Before we describe anything technical, let's see one in action. An op-amp can be connected to a single voltage rail (called UNIPOLAR SUPPLY - 0v to Vcc) or a dual voltage rail (called BIPOLAR SUPPLY +/-Vcc). When connected to a single voltage rail, the output can go from 0v to approx full rail voltage. The OP-AMP has two inputs. A "+" input for non-inverting and "–" for inverting. If the "–" input sits at half rail voltage via two equal-value resistors, the "+" input must go above ½V for the output to go HIGH, as shown in the animation below: The "–" input can control the output as shown in the animation below: From the animations above we have shown two things: 1. The OP-AMP can be used as a VOLTAGE FOLLOWER. Note: the output follows the input The OP-AMP in the arrangement above has UNITY GAIN (gain = 1). We will now show how to obtain GAIN or AMPLIFICATION from an OP-AMP. From the animation above, you can see how to turn an OP-AMP into an AMPLIFIER. The basic parameters for a 741 are:

View topic - Yamaha PSS-570 So after a year it is time to revive this topic. It's done my Yamaha..... So what's in it? Left panel: The upper three switches are from left to right for clipping circuit on a build in Mufffuzz effect, true bypass for fuzz effect and a mild distortion switch that also eliminates the drum section. The three pots are for the stereo chorus mod, which controls depth and intensity. The middle pot is for the fuzzzzz. The ASM-1 homepage Magnus / synths / friends /stopp by Gene Stopp and additional text by Magnus Danielson Prolog The ASM-1 synthesizer project was created by Gene Stopp < gene@ixiacom.com > and not by me Magnus Danielson < magnus@analogue.org >. Gene has been generous enougth to share his work in various ways and the sanctioning of this webpage is just one of those ways. Originally Gene produced and sold the PCB. The PCBs is done in a real PCB shop and has a high quality and I strongly recommend them. Please note that I, Magnus, in no way is affiliated with the PCB selling. What you get is a circuit board, plus documentation with a parts list, circuit description, and building hints. The circuit board is professional quality - double-sided, soldermasked, silkscreened, and drilled with plated-through holes. Note: This page has been created in order to spread the word and is not a marketing trick. Enjoy! General Description 2 Voltage Controlled Oscillators (VCO's) Sawtooth and variable rectangular outputs Trimpots

Tom Oberheim.com ACX Synth Classic Audio Products of Illinois The gar2520 DOA Full Kit Bundle is a full and complete parts kit with everything required to complete the gar2520 Discrete Operational Amplifier build. This board has been designed by Gary Barnett of Barnett Industries. Gary has built upon the reverse engineering work of Peter Lazaro, better know as “Peter Purpose”. The gar2520 sounds absolutely fantastic in our VP25, VP26 and VP312 microphone preamplifiers. Some of the applications the gar2520 DOA can be used for: Microphone Preamplifiers Line or Booster Amplifiers Lossless Combining Amplifiers Balanced Transformerless Amplifiers Equalizers and Compressors Additional features and specs: Industry standard 2520 footprint for plug-in or PC mount connections Low noise, high power output Low distortion Minimum load impedance is 75 ohms for full output voltage Power supply voltage is bi-polar +/- 12 VDC to +/- 20 VDC Includes all top quality parts and components A complete PDF assembly guide including BOM will be provided via email after purchase

Eowave Filterbug - Real Analogue 24 dB Low-pass Stereo Filter | DiscoFreq's Effects Database Pictures Controls Gaincontrols the volumeLFO Speedcontrols the speed of the LFOLFO Depthcontrols how much the LFO moves the filterEnvcontrols how the filter responds to the envelope of the input signalCut Offcontrols the filter's cut off frequencyResonancecontrols the filter's resonance Various Eowave FilterBugs are analog stereo 24 dB low-pass filters with the extraordinary capability to give a real analog feeling to any digital sounds from your synths, samplers or computers. Most recent forum threads No forum threads about this effect yet. Link to this page Here's some code to post a link with image on forums, eBay, websites,... Eowave Filter Bug stereo analog filter Eowave Filter Bug stereo analog filter envelope-controlled envelope follower amplitude controlled low frequency oscillator lfo-controlled desktop tabletop table top filter eq/excite/filter lowpass lopass lo-pass lp lpf low-pass filter

Red_Square Tom Carpenter has offered some Red Square PCBs and panels for sale on his site. Here is a link to the Analogue Solutions page. You need to scroll down and select older entries then click on the Red Square PCB link. When you buy the PCBs, you get two large PCBs which are scored and can be split into 5 separate PCBs. I suggest making the scores deeper on both sides of the PCBs with a utility knife. Carefully break them apart. Tom also supplies a parts list and a PCB component map although there are some differences in the documents and the PCB, more later. Sourcing parts is not too bad. At Futurlec, I found: The 2SK30As and sSC828s are cheaper at Futurlec. At Cricklewood, I found: For pots, they are Alpha pots and can be had at Mouser and/or Small Bear Electronics. Mouser, audio taper:Alpha miniature 16mm PCB mount pot Small Bear:Alpha Single-Gang 16mm PC Mount Vertical The ones with the switch are also an Alpha pot, and Small Bear didn't have the 10k, so I bought them at Mouser. David

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