audio-math-explainer SKILL.md skillA
audio-math-explainer from gourdja/sonic-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add gourdja/sonic-skills/audio-math-explainer@git:20260515.3a80b75Pins git:20260515.3a80b75 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- gourdja/sonic-skills
- Path
skills/audio-math-explainer/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260515.3a80b75, committed May 15, 2026
- Size
- 3,268 bytes
- Repository stars
- 4
- License
- Unlicense
Explains DSP math concepts to developers who need the theory behind an algorithm. Use whenever the user asks how a signal-processing concept works, wants intuition behind a formula, or hits a math-shaped bug. Trigger on phrases like "how does a Fourier transform work", "explain z-transforms", "what is convolution", "why does my biquad ring", "what is windowing for", "what causes aliasing", or "how do I convert gain to dB". Also trigger when the user pastes DSP code and asks why it behaves a…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Audio Math Explainer > **The rule:** DSP math is small and composable — each concept builds directly on the last. > Start with what the user needs, then connect it to code they're writing. ## Step 1 — Identify the concept | Topic | Core idea | Common "why" | |-------|-----------|--------------| | Fourier transform / DFT / FFT | Decompose signal into frequency components | "Why does my FFT output look wrong?" | | Convolution | Weighted moving average; LTI system response | "How does an IR reverb work?" | | Z-transform | Frequency-domain analysis of discrete systems | "How do filter poles/zeros work?" | | Biquad / IIR filters | Recursive difference equation with feedback | "Why does my filter ring / go unstable?" | | FIR filters | Non-recursive weighted sum | "How do I design a linear-phase filter?" | | Windowing | Reduce spectral leakage in DFT | "Why are FFT edges smeared?" | | Sample rate / Nyquist | Highest representable frequency = sr/2 | "What causes aliasing?" | | Decibels | Log scale for amplitude/power ratios | "How do I convert gain to dB?" | If the user's question maps to multiple rows, start with the most fundamental one and build up. …
Read the whole file at its exact version.
How to install
mdr add gourdja/sonic-skills/audio-math-explainer@sha256:4bcbb483b3526441The line at the top of this page pins the label git:20260515.3a80b75, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_d2riph2lisilfsdc)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on May 15, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3268 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
gourdja/sonic-skills · 4 stars · license Unlicense · pushed 2026-10-12 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_d2riph2lisilfsdc GET https://markdownregistry.com/api/v1/resolve?ref=gourdja/sonic-skills/audio-math-explainer GET https://markdownregistry.com/api/v1/blob/4bcbb483b35264417af6d9b6660ac88009d635ebb19a17e07553115182c915ec
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.