How to make video sound effects in code with earshot — guide skill for sound effects

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Open-source CLI and MCP server: make free UI and motion sound effects in code and let an agent hear them.

• Type: Guide · Sound effects
• Slug: earshot
• Status: beta
• Publisher: Leon Lin (community)
• License: MIT
• Source: https://github.com/Leonxlnx/earshot
• Works in: Claude Code, Codex, Any MCP client
• Requires: Python 3.10+, ffmpeg
• Cost: Free / open source, runs locally on CPU

What it does

Sound effects for motion graphics made from code, with no ElevenLabs or Suno bill: a coding agent runs earshot forge to synthesize UI pops, knocks, hits, risers and chimes from a bank of 252 sounds, checks timing against the cut, and fixes what sounds wrong. It also describes a recording in words, scores a film's soundtrack against launch films and turns a recording into code the agent can vary. Runs locally on CPU as a CLI, Python API and MCP server. The source post (Japanese, 67K views, 1,421 bookmarks) shows a motion-graphics demo whose every sound came from code. Needs Python 3.10+ and ffmpeg.

Use when

• how to make video sound effects in code with earshot
• open source sound effects generator for motion graphics
• how to make UI sound effects without ElevenLabs
• how to let a coding agent hear its own audio
• synthesize sound effects with code for a video
• free SFX for AI motion graphics
• sound design for launch videos from code
• MCP server for audio analysis and sound effects

Not for

• Realistic foley such as horns, drums or crowds: a creator who tried code-made sounds for a history short swapped them for recorded samples

Install

• Claude Code: git clone https://github.com/Leonxlnx/earshot && cd earshot && python -m venv .venv

More sound effects skills

• ElevenLabs Sound Effects: Generate sound effects and ambiences from a text description, including seamless loops.
• ElevenLabs Voice Isolator: Strip background noise and music from dialogue to get clean, isolated speech.
• ElevenLabs Sound Effects (inference.sh): Generate royalty-free sound effects from text with ElevenLabs, via inference.sh.
• ElevenLabs Voice Isolator (inference.sh): Remove background noise and isolate vocals from any recording with ElevenLabs, via inference.sh.
• FLUX 3 Audio & Dialogue: Direct FLUX 3's generated sound: dialogue, voiceover, ambience, effects, music, silence and timing.
• Kling SFX via dLazy: Generate sound effects from a text prompt or matched to a video with Kling SFX, through the dLazy CLI.