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paper_synth:ps301_wavefolder [2015/12/19 12:14] antti |
paper_synth:ps301_wavefolder [2020/06/11 22:13] (current) |
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| - | ---- | ||
| ===== PS301 - Diode Wavefolder ===== | ===== PS301 - Diode Wavefolder ===== | ||
| - | ---- | + | by Antti Pussinen\\ |
| Ps301 Diode Wavefolder is a dynamic waveform processor module, that changes the color and the overtones of a sound, while keeping the same base note. The design is originally Jürgen Haible's take on "Serge Wave Multiplier, middle section". Yves Usson of YuSynth added an exponential VCA to the design, making voltage control possible, and we modified the circuit further to fit our design requirements. | Ps301 Diode Wavefolder is a dynamic waveform processor module, that changes the color and the overtones of a sound, while keeping the same base note. The design is originally Jürgen Haible's take on "Serge Wave Multiplier, middle section". Yves Usson of YuSynth added an exponential VCA to the design, making voltage control possible, and we modified the circuit further to fit our design requirements. | ||
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| The Controls Include "CV attenuation", "Fold Range" (which can also be contolled with 0-5v control voltage) and "Fold Amount" which changes the amount of folds. Inputs and outputs conform to eurorack standards of 10Vpp, and it runs on eurorack +-12v power supply, and even with +15v power supply from Frack Rack or MOTM synthesizer systems. | The Controls Include "CV attenuation", "Fold Range" (which can also be contolled with 0-5v control voltage) and "Fold Amount" which changes the amount of folds. Inputs and outputs conform to eurorack standards of 10Vpp, and it runs on eurorack +-12v power supply, and even with +15v power supply from Frack Rack or MOTM synthesizer systems. | ||
| - | ---- | ||
| + | {{:paper_synth:ps301_-_diode_wavefolder2.jpg?200|}}\\ | ||
| + | {{:paper_synth:ps301_-_diode_wavefolder_back.jpg?200|}}\\ | ||
| + | |||
| + | |||
| + | ---- | ||
| ==== Theory of operation ==== | ==== Theory of operation ==== | ||
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| "A string of diodes is driven with the amplified and level shifted input signal. After each diode there is a "tap" with a resistor that will contribute positive or negative to the output of a two-opamp subtracting amplifier. There are two virtual GND nodes for these summing and subtracting operation. By feeding these virtual GND nodes alternately from the taps of the diode string, you can have the output voltage increased when one diode drop voltage is reached, and have the output voltage decreased again when the next diode in row starts conducting. The number of valleys and peaks is only determined by the length of the diode string, and not by the number of opamps. It turned out that choosing equal resistor values results in an almost regular pattern of the voltage transfer function." | "A string of diodes is driven with the amplified and level shifted input signal. After each diode there is a "tap" with a resistor that will contribute positive or negative to the output of a two-opamp subtracting amplifier. There are two virtual GND nodes for these summing and subtracting operation. By feeding these virtual GND nodes alternately from the taps of the diode string, you can have the output voltage increased when one diode drop voltage is reached, and have the output voltage decreased again when the next diode in row starts conducting. The number of valleys and peaks is only determined by the length of the diode string, and not by the number of opamps. It turned out that choosing equal resistor values results in an almost regular pattern of the voltage transfer function." | ||
| + | |||
| + | {{ :paper_synth:ps301_-_diode_wavefolder.jpg?300 |}}\\ | ||
| + | |||
| ---- | ---- | ||
| ==== Audio & Video ==== | ==== Audio & Video ==== | ||
| Line 29: | Line 35: | ||
| ---- | ---- | ||
| - | |||
| ==== Board ==== | ==== Board ==== | ||
| - | {{:paper_synth:ps301_diode_wavefolder_board.jpg|}} | + | {{:paper_synth:ps301_diode_wavefolder_board.jpg?400|}} |
| ---- | ---- | ||
| - | |||
| ==== Faceplate==== | ==== Faceplate==== | ||
| - | {{ :paper_synth:ps301-faceplate-.jpg?100 |}} | + | {{:paper_synth:ps301-faceplate-.jpg?100|}}\\ |
| ---- | ---- | ||
| - | |||
| - | |||
| ==== Parts ==== | ==== Parts ==== | ||
| Line 83: | Line 86: | ||
| Thonkiconn 3.5mm jack socket 3 | Thonkiconn 3.5mm jack socket 3 | ||
| + | ---- | ||
| + | ==== Scope Pictures ==== | ||
| + | Input Waveworm: SAW | ||
| + | {{:paper_synth:ps301scope1.jpg?200|}} | ||
| + | {{:paper_synth:ps301scope2.jpg?200|}} | ||
| + | {{:paper_synth:ps301scope3.jpg?200|}} | ||
| + | {{:paper_synth:ps301scope4.jpg?200|}} | ||
| + | {{:paper_synth:ps301scope5.jpg?200|}} | ||
| + | ---- | ||
| + | ==== Links ==== | ||
| + | Sources of information \\ | ||
| + | [[http://yusynth.net/Modular/EN/WAVEFOLDER/]] \\ | ||
| + | [[http://jhaible.com/legacy/jh_wavefolder.html]] | ||
| ---- | ---- | ||
| + | ==== License ==== | ||
| + | The PS301 - Diode Wavefolder was designed by **Antti Pussinen** 2016.\\ | ||
| + | It is licensed under a [[http://creativecommons.org/licenses/by-nc-sa/4.0/"|Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License]]. | ||
| - | ==== Scope Pictures ==== | + | <html> |
| + | <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-nc-sa/4.0/88x31.png" /></a> | ||
| + | </html> | ||
| - | Input Waveworm: SAW | + | ---- |
| - | {{:paper_synth:ps301scope1.jpg|}} | ||
| - | {{:paper_synth:ps301scope2.jpg|}} | ||
| - | {{:paper_synth:ps301scope3.jpg|}} | ||
| - | {{:paper_synth:ps301scope4.jpg|}} | ||
| - | {{:paper_synth:ps301scope5.jpg|}} | ||
| - | |||
| - | |||
| - | ==== Links ==== | ||
| - | Sources of information | ||
| - | [[http://yusynth.net/Modular/EN/WAVEFOLDER/]] | ||
| - | [[http://jhaible.com/legacy/jh_wavefolder.html]] | ||