Agent skill

Audio Analysis Window

by ad-repo in ad-repo/nullplayer

The classic and modern Audio Analyzer windows — a Friture-style multi-pane analyzer (Scope, Levels, Spectrogram, Octave, Pitch, Delay), the stereo PCM path that feeds them, per-pane consumer gating…

Custom licenceAuto-check passed

Install Audio Analysis Window

skills CLI
$ npx skills add ad-repo/nullplayer --skill audio-analysis-window -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install ad-repo/nullplayer audio-analysis-window --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/audio-analysis-window .claude/skills/audio-analysis-window && rm -rf skills-src

Use ~/.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/

Facts

Skill name
audio-analysis-window
GitHub stars
158
Token cost
~3.3k tokens
SKILL.md length
1,428 words
Files
1
Skills in repo
40
Repo updated
First seen
Licence
Custom licence

At a glance

The classic and modern Audio Analyzer windows — a Friture-style multi-pane analyzer (Scope, Levels, Spectrogram, Octave, Pitch, Delay), the stereo PCM path that feeds them, per-pane consumer gating…

  • Modifying either analyzer window
  • SKILL.md covers Accessing, Window chrome & sizing, Panes and What each pane shows (behavior…, plus 4 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • The spectrogram shader

What it does

Audio Analysis Window is an agent skill from ad-repo/nullplayer. The classic and modern Audio Analyzer windows — a Friture-style multi-pane analyzer (Scope, Levels, Spectrogram, Octave, Pitch, Delay), the stereo PCM path that feeds them, per-pane consumer gating, and the shared AudioAnalysisDSP module. Use when modifying either analyzer window, its panes, the spectrogram shader, or the stereo/DSP plumbing.

Its SKILL.md is about 3.3k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: nullPlayer is a free open source macOS media player with some unique features.

When your agent uses it

  • Modifying either analyzer window
  • The spectrogram shader
  • The stereo/DSP plumbing

Example prompts

  • “/audio-analysis-window”

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

    No scripts in the folder and no shell commands in SKILL.md.

    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):

    • friture.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 Analysis Window loads about 3.3k tokens when it runs. Until then it costs about 92 tokens; SKILL.md has 1,428 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~92
When it runs · the whole SKILL.md, loaded when a task matches
~3.3k

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 1,428 words (~3,279 tokens).

“A classic and modern UI window offering a Friture-style (https://friture.org) real-time view of the playing audio. Exactly one pane is visible at a time; the pane is selected via the window's right-click context menu (no in-window controls — matches the…”

— opening of SKILL.md by ad-repo, Custom licence
name
audio-analysis-window

Read the full SKILL.md on GitHub

Files

Just SKILL.md in skills/audio-analysis-window of ad-repo/nullplayer.

Open the folder on GitHubat commit 3d87ce1

Compare with similar skills

Audio Analysis Window 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.

Audio Analysis Window compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Audio Analysis Window this skillad-repo/nullplayer158—~3.3kAutomated safety check: PassCustom licence
Analyzing Windows Registry For Artifactsmukul975/Anthropic-Cybersecurity-Skills34k—~2.9kAutomated safety check: PassApache-2.0
Analyzing Windows Event Logs In Splunkmukul975/Anthropic-Cybersecurity-Skills34k—~2.8kAutomated safety check: PassApache-2.0
Analyzing Windows Prefetch With Pythonmukul975/Anthropic-Cybersecurity-Skills34k—~1.3kAutomated safety check: PassApache-2.0
Analyzing Windows Amcache Artifactsmukul975/Anthropic-Cybersecurity-Skills34k—~2.8kAutomated safety check: PassApache-2.0
Analyzing Windows Lnk Files For Artifactsmukul975/Anthropic-Cybersecurity-Skills34k—~3.2kAutomated safety check: PassApache-2.0

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Questions about Audio Analysis Window

What does Audio Analysis Window do?

The classic and modern Audio Analyzer windows — a Friture-style multi-pane analyzer (Scope, Levels, Spectrogram, Octave, Pitch, Delay), the stereo PCM path that feeds them, per-pane consumer gating…. Audio Analysis Window is an agent skill from ad-repo/nullplayer. The classic and modern Audio Analyzer windows — a Friture-style multi-pane analyzer (Scope, Levels, Spectrogram, Octave, Pitch, Delay), the stereo PCM path that feeds them, per-pane consumer gating, and the shared AudioAnalysisDSP module.

When should I use Audio Analysis Window?

Audio Analysis Window fits situations like: modifying either analyzer window; the spectrogram shader; the stereo/DSP plumbing.

How do I install Audio Analysis Window in Claude Code?

Run `npx skills add ad-repo/nullplayer --skill audio-analysis-window -a claude-code`. Or copy the skill folder (skills/audio-analysis-window in ad-repo/nullplayer) into .claude/skills/audio-analysis-window in your project. Claude Code loads it when a task matches its description.

How do I install Audio Analysis Window in Codex?

Run `npx skills add ad-repo/nullplayer --skill audio-analysis-window -a codex`. Or copy the skill folder (skills/audio-analysis-window in ad-repo/nullplayer) into .agents/skills/audio-analysis-window in your project. Codex loads it when a task matches its description.

Can I use Audio Analysis Window 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-analysis-window -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-analysis-window, .gemini/skills/audio-analysis-window, .github/skills/audio-analysis-window and .opencode/skills/audio-analysis-window in your project.

What does Audio Analysis Window need to run?

SKILL.md names no scripts, command-line tools or credentials: Audio Analysis Window is instructions for the agent only.

Does Audio Analysis Window access the network?

SKILL.md names 1 domain. As links in the text: friture.org. This is read from the text; nothing was executed.

Is Audio Analysis Window 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 Analysis Window use?

Audio Analysis Window 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 Analysis Window use?

About 3.3k tokens (SKILL.md is roughly 13k 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 Analysis Window?

Skills that share tags, products or a category with Audio Analysis Window: Analyzing Windows Registry For Artifacts (mukul975/Anthropic-Cybersecurity-Skills, 34k stars), Analyzing Windows Event Logs In Splunk (mukul975/Anthropic-Cybersecurity-Skills, 34k stars), Analyzing Windows Prefetch With Python (mukul975/Anthropic-Cybersecurity-Skills, 34k stars) and Analyzing Windows Amcache Artifacts (mukul975/Anthropic-Cybersecurity-Skills, 34k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Audio Analysis Window?

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.