HyperFrames Audio
heygen-com/hyperframes
Mixes audio already placed in a HyperFrames composition: fades, gain, ducking under a voiceover, effect chains, automation and shared submix buses.
Audio engine architecture, local/streaming pipelines, EQ, spectrum analysis, and playback flow.
Custom licenceAuto-check passed
Install Audio System
$ npx skills add ad-repo/nullplayer --skill audio-system -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ad-repo/nullplayer audio-system --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/audio-system .claude/skills/audio-system && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "audio-system" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/audio-system into .claude/skills/audio-system/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "audio-system", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/ad-repo/nullplayer/tree/main/skills/audio-systemType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add ad-repo/nullplayer --skill audio-system -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ad-repo/nullplayer audio-system --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/audio-system .agents/skills/audio-system && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "audio-system" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/audio-system into .agents/skills/audio-system/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "audio-system", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add ad-repo/nullplayer --skill audio-system -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ad-repo/nullplayer audio-system --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/audio-system .cursor/skills/audio-system && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "audio-system" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/audio-system into .cursor/skills/audio-system/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "audio-system", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/ad-repo/nullplayer.git --path skills/audio-system--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add ad-repo/nullplayer --skill audio-system -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ad-repo/nullplayer audio-system --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/audio-system .gemini/skills/audio-system && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "audio-system" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/audio-system into .gemini/skills/audio-system/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "audio-system", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install ad-repo/nullplayer audio-systemInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add ad-repo/nullplayer --skill audio-system -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/audio-system .github/skills/audio-system && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "audio-system" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/audio-system into .github/skills/audio-system/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "audio-system", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add ad-repo/nullplayer --skill audio-system -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ad-repo/nullplayer audio-system --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/audio-system .opencode/skills/audio-system && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "audio-system" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/audio-system into .opencode/skills/audio-system/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "audio-system", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
audio-system- GitHub stars
- 158
- Token cost
- ~11k tokens
- SKILL.md length
- 4,754 words
- Files
- 4
- Skills in repo
- 40
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Audio engine architecture, local/streaming pipelines, EQ, spectrum analysis, and playback flow.
- Works in 8 steps: Sample extraction - Get float samples… → Windowing - Apply Hann window to reduce… → FFT - 2048-point DFT using Accelerate… → …
- Working on audio playback
- SKILL.md covers Overview, Architecture Diagram, Components Quick Reference and Equalizer, plus 4 more sections
- Calls ffmpeg
What it does
Audio System is an agent skill from ad-repo/nullplayer. Audio engine architecture, local/streaming pipelines, EQ, spectrum analysis, and playback flow. Use when working on audio playback, streaming, equalization, spectrum visualization, BPM detection, or ProjectM integration.
Its SKILL.md is about 11k tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files (for example `audio-pipelines.md`, `playback-flows.md` and `spectrum-algorithms.md`).
The repository describes itself as: nullPlayer is a free open source macOS media player with some unique features.
When your agent uses it
- Working on audio playback
- Spectrum visualization
- ProjectM integration
Example prompts
- “/audio-system”
Workflow steps
8 steps, taken from the first numbered list in SKILL.md.
- Sample extraction - Get float samples from PCM buffer (mono-mix stereo)
- Windowing - Apply Hann window to reduce spectral leakage
- FFT - 2048-point DFT using Accelerate framework
- Magnitude calculation - Convert complex output to magnitudes
- Band aggregation - Accurate mode is pipeline-specific; adaptive/dynamic modes interpolate at band center frequencies
- Frequency weighting - Apply compensation curve (adaptive/dynamic modes)
- Normalization - Scale based on selected mode
- Smoothing - Fast attack, slow decay for visual appeal
What it can do on your machine
Read from SKILL.md and the folder at commit 3d87ce1. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
ffmpeg
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
github.comaubio.org
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Audio System loads about 11k tokens when it runs. Until then it costs about 58 tokens; SKILL.md has 4,754 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 4,754 words (~10,851 tokens).
“This guide describes NullPlayer's audio playback system, including local file playback, streaming audio, equalization, spectrum analysis, and waveform generation.”
- name
- audio-system
Files
SKILL.md and 3 other files in skills/audio-system of ad-repo/nullplayer.
- SKILL.md
- audio-pipelines.md
- playback-flows.md
- spectrum-algorithms.md
Open the folder on GitHubat commit 3d87ce1
Compare with similar skills
Audio System next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Audio System this skillad-repo/nullplayer | 158 | — | ~11k | Automated safety check: Pass | Custom licence | |
| HyperFrames Audioheygen-com/hyperframes | 60k | 1 repos | ~6.4k | Automated safety check: Pass | Apache-2.0 | |
| Matlab Process Streaming Audiomatlab/matlab-agentic-toolkit | 1.1k | — | ~5.7k | Automated safety check: Pass | Custom licence | |
| Opensource Pipelineaffaan-m/ECC | 276k | 1 repos | ~1.8k | Automated safety check: Notes | MIT | |
| Orch Pipelineaffaan-m/ECC | 276k | 1 repos | ~1.6k | Automated safety check: Pass | MIT | |
| AI Pipeline Orchestrationsickn33/agentic-awesome-skills | 47k | 1 repos | ~2.5k | Automated safety check: Pass | MIT |
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Opensource Pipeline
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Orch Pipeline
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Shared orchestration engine behind the orch- skill family — the gated Research-Plan-TDD-Review-Commit pipeline, size classifier, agent and command map, and two human gates (plan approval, commit…
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Questions about Audio System
What does Audio System do?
Audio engine architecture, local/streaming pipelines, EQ, spectrum analysis, and playback flow. Audio System is an agent skill from ad-repo/nullplayer. Audio engine architecture, local/streaming pipelines, EQ, spectrum analysis, and playback flow.
When should I use Audio System?
Audio System fits situations like: working on audio playback; spectrum visualization; projectM integration.
How do I install Audio System in Claude Code?
Run `npx skills add ad-repo/nullplayer --skill audio-system -a claude-code`. Or copy the skill folder (skills/audio-system in ad-repo/nullplayer) into .claude/skills/audio-system in your project. Claude Code loads it when a task matches its description.
How do I install Audio System in Codex?
Run `npx skills add ad-repo/nullplayer --skill audio-system -a codex`. Or copy the skill folder (skills/audio-system in ad-repo/nullplayer) into .agents/skills/audio-system in your project. Codex loads it when a task matches its description.
Can I use Audio System in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ad-repo/nullplayer --skill audio-system -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/audio-system, .gemini/skills/audio-system, .github/skills/audio-system and .opencode/skills/audio-system in your project.
What does Audio System need to run?
Going by SKILL.md and its folder, Audio System needs the command-line tools its instructions call (ffmpeg).
Does Audio System access the network?
SKILL.md names 2 domains. As links in the text: github.com and aubio.org. This is read from the text; nothing was executed.
Is Audio System safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Audio System use?
Audio System has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Audio System use?
About 11k tokens (SKILL.md is roughly 43k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Audio System?
Skills that share tags, products or a category with Audio System: HyperFrames Audio (heygen-com/hyperframes, 60k stars), Matlab Process Streaming Audio (matlab/matlab-agentic-toolkit, 1.1k stars), Opensource Pipeline (affaan-m/ECC, 276k stars) and Orch Pipeline (affaan-m/ECC, 276k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Audio System?
ad-repo (a GitHub user) maintains it in ad-repo/nullplayer, which has 158 GitHub stars. The repository holds 40 skills in this directory. The repository was last updated on October 10, 2026.
Source: ad-repo/nullplayer on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.