# Case Studies — AJTheDev

Canonical: https://ajthe.dev/case-studies/

Each entry links its markdown mirror; the HTML page is the same URL ending in .html.

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- [Abigail: A Voice-First AI Operations Platform](https://ajthe.dev/case-studies/posts/abigail-voice-ai-platform.md) — 10 Jul 2026 — Consolidating roughly fifteen prior assistant and agent builds into one local, hands-free, interruptible voice platform that acts on your machine behind a safety firewall.
- [DirectoryLM: Grounded Explainer Videos From Any Folder](https://ajthe.dev/case-studies/posts/directorylm-explainer-engine.md) — 10 Jul 2026 — Point it at a directory, get a grounded 3–6 minute explainer video where every factual claim is traceable to a source file. Local-first — NotebookLM meets a YouTube documentary.
- [Lyric Video Builder: Frame-Perfect Karaoke Videos in the Browser](https://ajthe.dev/case-studies/posts/lyric-video-builder.md) — 10 Jul 2026 — A lyric video creator combining GPU audio analysis, Whisper transcription with forced alignment, and real-time in-browser WebCodecs rendering to produce frame-perfect karaoke-style music videos.
- [The AJ Suno V5 Mastery Guide](https://ajthe.dev/case-studies/posts/suno-v5-mastery-guide.md) — 30 Nov 2025 — Reverse-engineered Suno V5's AI music generation system through 2+ years of systematic testing, documented into a 26,000-word comprehensive guide with 30 chapters covering every aspect of mastering AI music production.
- [AJVV Studio: VibeVoice API Expansion](https://ajthe.dev/case-studies/posts/vibevoice-api-expansion.md) — 28 Nov 2025 — Built a production-ready TTS API and web studio on top of Microsoft's VibeVoice, featuring WebSocket streaming, voice cloning, and 48k mastered output.
- [Netflix Dark Crystal Launch Event](https://ajthe.dev/case-studies/posts/netflix-dark-crystal.md) — 1 Aug 2019 — Built an interactive voiceover booth system for Netflix's Dark Crystal launch event, processing 3,500+ guests in a single month.