audio-wasapi

audio-wasapi is a skill for Claude Code from damionrashford/media-os. It costs 212 tokens per session (3,628 once invoked), scanned A, original, MIT.

A Windows audio control guide for WASAPI, Windows’ built-in system for sending and receiving audio. It uses command-line and PowerShell tools to manage playback and recording devices.

In plain words
What is it for?
Use it to list devices, choose default playback or recording devices, mute or change volume, test exclusive mode, and set up virtual audio cables or mixers for streaming.
Why use it?
It avoids repeated trips through Windows sound settings and helps investigate problems involving device selection, exclusive access, volume, or audio formats.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Part of the media-os plugin — 121 skills, 11 agents, 5 hooks, 1 plugin shipped together

Good fit Use it to list devices, choose default playback or recording devices, mute or change volume, test exclusive mode, and set up virtual audio cables or mixers for streaming.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/damionrashford/media-os/audio-wasapi
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add damionrashford/media-os --skill audio-wasapi
Clone the repo
git clone --depth 1 https://github.com/damionrashford/media-os

Made for: Claude Code.

Or install media-os, the plugin that ships this one along with the rest of its 121 skills, 11 agents, 5 hooks, 1 plugin.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for audio-wasapi

README.md
[![agentmods](https://agentmods.dev/badge/skills/damionrashford/media-os/audio-wasapi/github.svg)](https://agentmods.dev/skills/damionrashford/media-os/audio-wasapi)
Your own site
<a href="https://agentmods.dev/skills/damionrashford/media-os/audio-wasapi"><img src="https://agentmods.dev/badge/skills/damionrashford/media-os/audio-wasapi/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for audio-wasapi

Your own site · 80×15
<a href="https://agentmods.dev/skills/damionrashford/media-os/audio-wasapi"><img src="https://agentmods.dev/badge/skills/damionrashford/media-os/audio-wasapi.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 212 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,628 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00212 $0.03628
Opus 5 $0.00106 $0.01814
Sonnet 5 $0.00042 $0.00726
Haiku 4.5 $0.00021 $0.00363

Measured 10d ago against content hash e3b46a5e13b6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

audio-wasapi scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/winaudio.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/audio-wasapi/SKILL.md · 347 lines

How it starts

The opening of the file, as written. The whole thing — 347 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Audio WASAPI

Context: $ARGUMENTS

Quick start

  • List all audio endpoints: → Step 1 (winaudio.py list-devices)
  • Check current default: → Step 2 (winaudio.py get-default)
  • Change default output/input/communications: → Step 3 (winaudio.py set-default)
  • Mute / unmute / change volume: → Step 4 (winaudio.py mute/unmute/volume)
  • Check if exclusive mode is allowed on a device: → Step 5 (winaudio.py exclusive-test)
  • Install VB-Cable virtual cable: → Step 6 (winaudio.py vbcable-install)
  • Set up VoiceMeeter virtual mixer: → Step 7 (winaudio.py voicemeeter-config)

When to use

  • User is on Windows and needs terminal / PowerShell-driven audio control.
  • User wants to change the default playback/recording/communications device without clicking through Sound settings.
  • User wants bit-perfect exclusive-mode output for audiophile playback, or to diagnose why an app can't grab the device in exclusive mode.
  • User wants to install a virtual audio cable (VB-Cable, VoiceMeeter) to route system audio into OBS / streaming tools.
  • User is debugging a shared-mode vs exclusive-mode mismatch (pops, silence, format negotiation errors).

Not for: macOS (use audio-coreaudio), Linux (use audio-pipewire).

The script exits 2 with a helpful message if run on non-Windows.

Read references/exclusive-vs-shared.md when the user asks about latency, bit-perfect playback, or IAudioClient::Initialize errors. Read references/virtual-cable.md when the user asks about OBS system-audio capture or VoiceMeeter routing.


Step 1 — List devices

uv run ${CLAUDE_SKILL_DIR}/scripts/winaudio.py list-devices
uv run ${CLAUDE_SKILL_DIR}/scripts/winaudio.py list-devices --kind playback
uv run ${CLAUDE_SKILL_DIR}/scripts/winaudio.py list-devices --kind recording

Calls Get-AudioDevice -List (from the AudioDeviceCmdlets PowerShell module). If the module isn't installed the PowerShell errors out — install with:

Read the full file on GitHub · 347 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago First seen · 347 lines · 212 tokens per session scan A e3b46a5e13b6

Subscribe to this mod's changes

audio-wasapi is a skill published in the GitHub repository damionrashford/media-os (18 stars, last pushed 3mo ago), licensed MIT. It adds 212 tokens to every session and 3,628 once invoked, about $0.0011 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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