Foundations

Lesson 04: Envelopes And LFO

Introduce time-based motion with event-shaping envelopes and repeating low-frequency modulation.

Foundations

Start with signal flow, modulation basics, and first sound design patches.

  • CV vs audio
  • oscillator, filter, VCA
  • envelopes and LFOs
Lesson

Markdown content

Theory, structure, and practical context are all driven from content files.

3

Related patches

Concrete repository anchors already exist for this lesson track.

Theory

A patch becomes musical when parameters change over time.

Two of the main time-based control sources are:

  • envelopes
  • LFOs

Envelope

An envelope reacts to a trigger or gate and shapes an event over time.

LFO

An LFO repeats cyclic movement over time.

It is useful for:

  • filter sweeps
  • vibrato
  • tremolo
  • slow texture motion

Patch Idea

Envelope -> VCA
LFO -> Filter cutoff

Practice

Make one short percussive sound and one long evolving sound using both control sources.