Synthesizer Wiki

This is not a proper Wiki anymore but simply a collection of static HTML pages with the same information.

support due to http://johannes.sipsolutions.net/Projects/new-moinmoin-latex

Basics

Op-amp circuits

• Basic OpAmpCircuits

• Fixed frequency active, 1-pole LP

Current sources

• René Schmitz' Expo tutorial

• Ebers-Moll equations/equivalent circuit -> exponential current source

  • simple variety (one transistor for applications where simplicity/component count trumps temperature stability)
  • compensation of temperature and other influences

• LinearCurrentSources

Filters

Building blocks

• OTA-C LP cell

• OTA-Integrator LP cell

• VCA-based LP cell

Filter topologies

• Passive and active filter design scripts

• Filter design derivations and calculators

Resonance control

• SoftClipping circuits

VCA

• Simple OTA-based VCA
• Derivations for SSM2164 linearization

• SSM2164 Dual VCA

VCO cores

Misc

• MIDI Sync modification for Boss DR-55 and DR-110 by Ben Riggs (Original Source)