Microfreak/UG/19 Appendix B Vocoder/02 How It Works/03 Vocoder Osc

• 19.2.3. The Vocoder Oscillator

  • A carrier rich in overtones gives the vocoder more material to shape. Use the Wave knob to move through sawtooth, pulse width, and noise waves; see also Microfreak/UG/06 Dig Osc/03 Types/22 Vocoder.
  • The Digital Oscillator
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  • Wave positions
    • 0%: sawtooth.
    • Around 11%: pulse wave at 50% duty cycle.
    • From 11% to 90%: increasing pulse width, reaching 97% duty cycle.
    • 91–100%: noise.

  • Note/Info The manual gives different duty cycles at Wave 90%: 97% here and 99% in Microfreak/UG/06 Dig Osc/03 Types/22 Vocoder.
    

  • Sawtooth, pulse-width, and noise waveforms
    • 
  • Timbre and Shape also control the Vocoder Oscillator.

  • Note/Info Oscillator Type cannot be modulated while the Vocoder Oscillator is active.
    

  • Microfreak/UG/19 Appendix B Vocoder/02 How It Works/03 Vocoder Osc/01 Timbre

    • 19.2.3.1. Timbre Encoder

      • Timbre selects the frequency range used for analysis and resynthesis. Vowel formants peak at different frequencies: for example, a “u” may have peaks near 330 and 1260 Hz, with variation across voices.
      • Matching the range to the speaker, or to an instrument used as a modulator, helps the filters respond to the frequencies that matter. Monitoring fewer frequencies can improve response time and output.
      • Vocoder filter bands and frequency response
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  • Microfreak/UG/19 Appendix B Vocoder/02 How It Works/03 Vocoder Osc/02 Shape

    • 19.2.3.2. Shape Encoder

      • Shape sets the bandwidth of each bandpass filter. Higher settings narrow the filters' frequency response and produce more pronounced harmonics.