# Cassandra Corsmeier (Cass Corsmeier)

> Hardware R&D, audio technology, and useful tools for people who make things with sound.

## Identity and working with Cass

Cassandra Corsmeier works on audio hardware, builds software for studio equipment, and produces and mixes music as datakink.
Cassandra Corsmeier, Cass Corsmeier, and datakink refer to the same person. cass.app is the main portfolio; datakink.com is the artist website. cassandracorsmeier.com redirects to cass.app.

- [About Cassandra](https://cass.app/about): Biography, hardware work, selected projects and official profiles
- [Service menu and full public context](https://cass.app/llms-full.txt): Repair, calibration, studio build-out and custom hardware inquiries; what to include; product purchase and support links; identity and source context

## Selected projects

- [PCM81 Control](https://cass.app/shop/pcm-81-control-plugin): PCM81 Control communicates with physical Lexicon PCM81 hardware. The product page, quick-start guide, and purchase policies are the sources for current compatibility, downloads, demo terms, licensing, and pricing.
- [Quadra Control](https://cass.app/about#quadra-control): Quadra Control is coming soon for the Quadraverb and Quadraverb Plus. This is an announcement, not a public purchase or download offer.
- [datakink](https://datakink.com): datakink is Cassandra Corsmeier's music, production, and mixing identity. datakink.com is the artist website; soundcloud.com/datakink is the linked music catalogue. These refer to the same person as cass.app.
- [24-7-B0T](https://cass.app/blog/247bot): The published 24-7-B0T article describes Cassandra's browser-agent project. It is a dated project write-up, not a claim that the described service or its original model stack is currently operating or available to others.
- [Bench notes](https://cass.app/resources/bench-notes): Bench notes is a browser-local tool. Notes are not uploaded, sent to an AI, or synced between devices. The public tool is distinct from any private notes a visitor enters into it.
- [PenTest+ flashcards](https://cass.app/resources/pentest-plus-flashcards-2026): Cassandra holds the CompTIA PenTest+ certification. These flashcards are an independent, unofficial study resource published on cass.app.

## Crawling policy

Automated crawlers are welcome on every public page. Canonical URLs and article discovery are also available through the sitemap.

## Core pages

- [Home](https://cass.app/): Introduction and featured writing
- [Blog](https://cass.app/blog): Complete article index
- [Music](https://cass.app/music): datakink, Cassandra's music production and mixing identity
- [Resources](https://cass.app/resources): Working notes, field guides, and useful technical fragments
- [Uses](https://cass.app/uses): Hardware, software, studio, and music gear
- [Services](https://cass.app/services): Audio electronics, calibration, studio workflows and scoped project help
- [Repair and project requests](https://cass.app/repair): Describe the work and request a quote; no payment to inquire
- [Buy me a coffee](https://cass.app/support): Optional one-time tips for published notes and tools, when checkout is available
- [Sitemap](https://cass.app/sitemap.xml): Canonical crawl index

## Independent services

Cass selectively takes on repair, calibration, studio workflow and electronics projects. This work is independent of QSC. Use the repair and project request form to describe the equipment or project and requested scope. Inquiries do not authorize a charge or start work; scope, price, timing and payment terms are agreed separately.

## Shop

- [Shop](https://cass.app/shop): Audio repair, calibration, and studio workflow services. Repairs are quoted individually.
- [PCM81 Control Plugin](https://cass.app/shop/pcm-81-control-plugin): Editor for physical Lexicon PCM81 hardware over bidirectional MIDI SysEx. One-time purchase at the current price shown on the product page: macOS 15+ on Apple silicon and Intel (AU, VST3 and standalone), Windows 10+ x64 (VST3 and standalone), two simultaneous activations, lifetime updates and 7-day refunds. Activation code and download link on screen and by email. A verified-email, one-computer 14-day Full demo requires no card or automatic charge and validates online at launch and every 15 minutes, with at most one hour offline. Free 0.4.4 macOS and Windows x64 standalone includes primary controls, read-only advanced summaries and complete preset compatibility; it ships no bundled presets. Import your own patches or read them from the PCM81. Full includes eight bundled presets.
- [PCM81 Control quick start](https://cass.app/shop/pcm-81-control-plugin/guide): Apple Developer ID signed and Apple-notarized macOS app and plug-ins, available as DMG. App and plug-in installation, Windows setup, MIDI and audio routing, activation, updates and support.
- [PCM81 Control purchase terms and privacy](https://cass.app/shop/pcm-81-control-plugin/policies): Digital delivery, seven-day refunds, lifetime updates, license validation and purchase-data handling.

## Resource notes

- [Bench notes](https://cass.app/resources/bench-notes): Browser notebook for repairs, projects, evidence, and human or agent handoffs. Portable JSON backups and Markdown work records; no note-upload API.
- [forum report](https://cass.app/resources/forum-report): Cirklon 2 host IN failure after switching PCM81 patches, with screenshots and CoreMIDI probe logs.
- [PenTest Plus Flashcards 2026](https://cass.app/resources/pentest-plus-flashcards-2026): Study PenTest+ concepts with 602 focused flashcards across 31 topics, spaced review, hands-free narration and email sign-in for cross-device progress.
- [Living with a lot of cameras](https://cass.app/resources/cameras-as-a-memory-layer): Cameras at home, in the garage, and in the car. What I want from all that footage, and where local AI might help.

## Articles

- [24-7-B0T](https://cass.app/blog/247bot): How I built a browser agent to read my timeline, save the threads worth keeping, and bring the results back to my own site.
- [Family Media Archive: Part 1](https://cass.app/blog/family-media-part-1): Recovering, organizing, and archiving decades of family media from SD cards.
- [Waiting for Agent...](https://cass.app/blog/waiting-for-agent): Gee I wish agents could browse the Internet for me
- [Making Your Way in 2025](https://cass.app/blog/2025): Do your experiences really exist if not recorded