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@maru shared this effect so you can build on it and use it in your DAW.

AvailableEffect

FX Mini

Drive, tone, and bounded feedback delay.

About

A compact pedal chain for a mono signal: drive into a tone filter into a feedback delay. It is the classic starter pedalboard in one small panel, and a simple, readable example of a complete effect.

The idea

The order is fixed and nothing is hidden between the stages. The tone filter sits after the drive, because that is where a tone control does the most work: it shapes the harmonics the drive has just created, rather than filtering the input before they exist. The delay comes last, so the repeats carry the driven, filtered sound.

Controls

  • Drive sets how hard the signal hits the saturation curve. Low settings are close to a clean boost.
  • Dist Mix blends the driven signal with the clean one, so you can keep some grit under a clear tone.
  • Tone is a low-pass filter from 200 Hz to 8 kHz.
  • Time spaces the repeats from 20 ms, for slapback, up to one second.
  • Feedback sets how much of each repeat feeds back. It stops at 0.9, so the delay can build and sing at the top of its range without running away.
  • Delay Mix is the level of the repeats against the dry signal.
  • Level is the final output trim.

Getting started

Play a guitar or another mono source through FX Mini. The default settings give a light drive with a quarter-second echo. For slapback, shorten Time and lower Feedback; for a long, singing tail, raise Time and Feedback together.

How it works.

The chain is distortion into a tone filter into a feedback delay, in that order and with nothing hidden between the stages. The drive stage is a waveshaper with its own wet/dry mix, so you can blend saturated signal under the clean one rather than committing to it.

Tone is a biquad low-pass sweeping 200 Hz to 8 kHz, placed after the distortion because that is where a tone control does the most work - filtering harmonics the drive stage just generated, rather than filtering the input before they exist.

The delay is single-tap with feedback capped at 0.9. That cap is deliberate: the delay will self-oscillate and sing at the top of its range, but it cannot run away and damage your monitoring. This is the same kernel the offline batch renderer uses, so a render matches what you hear here.

What would you make with FX Mini?

Describe what you want to make. Build it with the Studio agent.

Goes well with.

Prototype

Tube-style drive into a real cabinet.

Building block

Bit reduction and sample-rate reduction for digital grit.

Prototype

A compact subtractive synth for learning the signal path.