Octave Feedback Delay

How It Works

Technical view

The current pitch-delay family does not pitch-shift the input repeats directly. Instead, it combines a plain delayed version of the dry source with a separately synthesized picked-string phrase that is mixed in as the pitched layer. `time` sets the straight delay taps, `feedback` scales the synthetic harmony layer rather than a feedback loop, and `tone` brightens that added phrase. There is no recirculating octave feedback loop in the current implementation.

• Delay & Echo
• waveshaping / saturation
• delay processing
• oscillator / LFO modulation
• DC blocking

Signal Path

Compiled preview chain

Preview source: An internally generated picked-string phrase is widened to stereo as the dry source, and the current pitch-delay family also layers a separately synthesized higher-register picked phrase into the wet side instead of pitch-shifting the input repeats.

1. 1internal picked-string demo phrase
2. 2stereo spread with a short right-channel delay
3. 3straight delayed input taps
4. 4separately synthesized pitched phrase
5. 5high-shelf shaping on the pitched layer
6. 6repeat branches added over the dry source
7. 7DC blocker
8. 8output gain trim
9. 9final tanh limiter

Controls

Audible controls in this DSP

• mix

  Active

  Scales the repeat branch above the always-present dry phrase.

  Raises repeat level without fully removing the original attack.

• output_gain_db

  Active

  Applies final post-effect level trim after DC blocking and before the output limiter.

  Matches loudness without changing the actual delay structure.

• time

  Active

  Sets the delay time of the straight delayed taps that accompany the synthetic pitched layer.

  Moves the conventional echo spacing behind the added harmony phrase.

• feedback

  Active

  Raises the level of the internally synthesized pitched layer rather than creating a feedback loop.

  Makes the harmony-like repeats more prominent without increasing recirculating echoes.

• tone

  Active

  Adjusts the high shelf on the synthesized pitched layer.

  Makes the added harmony layer darker or brighter.

Analysis

Code-derived notes

Current implementation uses separately synthesized harmony layers instead of pitch-shifting the input repeats; Crystal Delay and Octave Feedback Delay currently share the same higher-register auxiliary phrase. Octave Feedback Delay does not yet place an octave shift inside a true feedback loop.