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feat: Add 4-Cable Method example preset (#154)#356

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feat: Add 4-Cable Method example preset (#154)#356
learnerabhinavdwivedi-droid wants to merge 5 commits into
sudip-mondal-2002:mainfrom
learnerabhinavdwivedi-droid:feat/4-cable-method-preset

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@learnerabhinavdwivedi-droid learnerabhinavdwivedi-droid commented Jun 6, 2026

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What does this PR do?

Related Issue

Fixes #

Type of Change

  • 🐛 Bug fix
  • ✨ New feature
  • ♻️ Refactor / code cleanup
  • 📝 Documentation
  • ✅ Tests
  • 🔧 Build / CI / Configuration

How Was This Tested?

  • Platform(s) tested on:
  • Test command run: ./amplitron-tests
  • Manual test steps (if applicable):

Checklist

  • Code compiles and builds successfully on my platform
  • All existing tests pass (./amplitron-tests)
  • New tests added for new functionality (if applicable)
  • Documentation updated (README, code comments) if applicable
  • No blocking calls on the audio thread (no std::mutex::lock() on the hot path)
  • Tested on: (list your OS/platform)

Screenshots / Demo

Summary by CodeRabbit

  • New Features

    • Added a 4‑Cable Method preset providing a ready signal chain: Input → Compressor → Overdrive → Wah → Amp Simulator → Delay → Reverb → Output for easy pre‑amp and FX‑loop routing.
  • Documentation

    • Added a 4‑Cable Method guide explaining pre‑amp vs post‑amp placement, effect placement recommendations, and a visual routing diagram.

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coderabbitai Bot commented Jun 6, 2026

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ℹ️ Review info
⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: b168e692-b333-4f08-a704-abda180f50bf

📥 Commits

Reviewing files that changed from the base of the PR and between 13ab94b and 676b33d.

📒 Files selected for processing (1)
  • presets/PRESETS.md
📝 Walkthrough

Walkthrough

Adds a new preset implementing the 4-Cable Method (4CM): a JSON routing graph with eight sequential processing nodes (Input → Compressor → Overdrive → Wah → Amp Simulator → Delay → Reverb → Output) and documentation describing Pre-Amp and Post-Amp placement with a diagram.

Changes

4-Cable Method Preset

Layer / File(s) Summary
4-Cable Method Routing Graph and Documentation
presets/05_4_Cable_Method.json, presets/PRESETS.md
New JSON preset defines eight nodes with 2D positions and directed edges forming a linear routing chain. PRESETS.md adds a "05. 4-Cable Method (4CM)" section describing Pre-Amp vs Post-Amp phases and includes a Mermaid diagram showing the full signal flow.

Sequence Diagram(s)

sequenceDiagram
  participant Input
  participant Compressor
  participant Overdrive
  participant Wah
  participant AmpSimulator
  participant Delay
  participant Reverb
  participant Output

  Input->>Compressor: audio
  Compressor->>Overdrive: compressed audio
  Overdrive->>Wah: overdriven audio
  Wah->>AmpSimulator: shaped tone
  AmpSimulator->>Delay: amp-simulated signal
  Delay->>Reverb: delayed signal
  Reverb->>Output: reverberated signal
Loading

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related issues

Suggested labels

type:feature, type:docs

Poem

🐰 I hopped into code with a little cheer,
Eight nodes in a row now neatly appear,
From Input to Output they travel and play,
The 4CM preset hops into the day,
Strumming tones and echoes along the way 🎸✨

🚥 Pre-merge checks | ✅ 5
✅ Passed checks (5 passed)
Check name Status Explanation
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title accurately describes the main change: adding a new 4-Cable Method example preset configuration file and its documentation.
Docstring Coverage ✅ Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@presets/05_4_Cable_Method.json`:
- Around line 2-23: The preset JSON uses the wrong schema: update the object
with routing: "graph", transform each node (e.g., entries with id values like
"node_input","node_comp", etc.) to remove nested position objects and instead
expose flat x and y properties on the node, and replace the "edges" array with
"links" where each link uses src and dst node ids plus src_pin/dst_pin keys
(instead of source/target); keep presetId "05_4_Cable_Method" and node ids the
same so the loader will recognize the 4-Cable Method routing.

In `@presets/PRESETS.md`:
- Line 41: The Mermaid code block terminator uses four backticks while the
opening fence uses three; update the closing fence to match the opening triple
backticks so the diagram renders correctly by replacing the four-backtick
terminator with three backticks after the "Reverb --> Out" block.
🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

ℹ️ Review info
⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 3269165b-48ba-4687-b260-e8048c4b5164

📥 Commits

Reviewing files that changed from the base of the PR and between 39100d0 and e560b90.

📒 Files selected for processing (2)
  • presets/05_4_Cable_Method.json
  • presets/PRESETS.md

Comment thread presets/05_4_Cable_Method.json
Comment thread presets/PRESETS.md Outdated
Wah --> Amp
Amp --> Delay
Delay --> Reverb
Reverb --> Out No newline at end of file

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⚠️ Potential issue | 🟡 Minor | ⚡ Quick win

Fix Mermaid code-fence terminator

Line 41 closes with four backticks while Line 9 opens with three. Use matching triple backticks so the diagram renders reliably.

Proposed fix
-````
+```
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@presets/PRESETS.md` at line 41, The Mermaid code block terminator uses four
backticks while the opening fence uses three; update the closing fence to match
the opening triple backticks so the diagram renders correctly by replacing the
four-backtick terminator with three backticks after the "Reverb --> Out" block.

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CODE RABBIT CHANGES

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done

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