Engineering Blog · Research & Benchmarks
Sovereign computing, local audio, and AI benchmarks.
Empirical packet captures, on-device Whisper performance evaluations, local LLM architectures, and data sovereignty engineering from Oyma.
Every article includes reproducible test scripts, verifiable system parameters, raw benchmark logs, and zero marketing puffery.
Flagship Technical Research Assets
Original experimental investigations into privacy telemetry, neural core inference speed, and local-first note durability.
Real Cost of AI and Voice in Obsidian
Comprehensive cost, security, and maintenance breakdown of cloud plugins versus native on-device speech in Obsidian vaults.
One Meeting Eight Notetakers Teardown
Comparative transcript accuracy, hallucination rates, and Markdown output quality across eight Mac meeting note assistants.
Meeting Recording Consent Laws Guide
Global legal guide to one-party and two-party audio recording consent, wiretap acts, and corporate privacy compliance.
60-Minute Meeting Packet Capture
Empirical network traffic audit of on-device recording versus cloud AI notetakers during a 60-minute meeting on Apple Silicon.
State of Local-First Notes Architecture
Technical analysis of file-based versus database storage architectures, data durability, and lock-in across note systems.
Whisper on Apple Silicon Benchmarks
Empirical speed, memory, and word error rate benchmarks for OpenAI Whisper across M1, M2, M3, and M4 Apple Silicon chips.
Engineering Essays & Architectural Analysis
Deep technical explorations of Markdown workflows, Apple Silicon neural acceleration, and air-gapped meeting transcription.
Air-Gapped Meeting Records: High Defense
Architectural guide to air-gapped meeting notes in defense and high-assurance sectors: zero RF emission, offline Whisper, and hardware tokens.
AirPlay & Display Audio: Loopback Pitfalls
Engineering guide to resolving audio routing conflicts in macOS: AirPlay receivers, Sidecar virtual displays, HDMI soundbars, and CoreAudio HAL tap stability.
APFS Internals: Scaling to 100,000 Notes
Deep dive into Apple File System (APFS) B-trees, inode traversal latency, fsevents cache invalidation, and scaling Markdown vaults to 100,000 notes.
Compiling Models for Apple Neural Engine
Deep compiler engineering guide to the Apple Neural Engine (ANE): operator support, Model Intermediate Language (MIL), and avoiding GPU fallbacks.
Audio DSP on macOS: SIMD Decimation & Buffers
Deep systems engineering guide to high-throughput audio DSP on macOS: SIMD polyphase decimation with Accelerate vDSP, lock-free ring buffers, and FIR filters.
Battery Drain Benchmark: Local vs Cloud AI
Empirical battery life benchmarks comparing local on-device transcription against cloud bot notetakers across 4-hour meeting marathons on Apple Silicon MacBooks.
Bluetooth HFP vs A2DP: Mac Audio Quality
Deep acoustic analysis of Bluetooth Hands-Free Profile (HFP) vs A2DP on macOS: 16 kHz SCO codec degradation, mSBC encoding, and Whisper accuracy.
Cold Boot Memory: Native Swift vs Electron
Deep profiling of resident memory, Mach port allocations, and startup latency comparing native macOS Swift architectures against Electron meeting notetakers.
CommonMark vs GFM: Markdown Spec Discrepancies
Exhaustive technical comparison of CommonMark 0.31.2 and GitHub Flavored Markdown (GFM): parser AST edge cases, pipe tables, task lists, and autolinks.
Long-Context LLMs in Meeting Notes: Recall Test
Needle In A Haystack (NIAH) benchmark across 32k, 64k, and 128k context windows in multi-hour meeting notes: retrieval accuracy, attention degradation, and latency.
Tapping macOS Audio: A CoreAudio HAL Guide
Deep architectural guide to capturing macOS system audio streams, managing CoreAudio HAL loopbacks, and synchronizing lock-free PCM buffers.
Darwin Process Isolation: TCC Audio Permissions
Deep security architecture analysis of macOS Transparency, Consent, and Control (TCC), CoreAudio entitlements, and protecting microphone streams from rogue apps.
DataviewJS Vault Performance at Scale
Analyze DataviewJS query performance across 50,000 Markdown notes. Learn AST caching, pagination techniques, and index optimizations for Obsidian vaults.
Record Discord Audio on Mac: Botless Guide
How to record and transcribe Discord voice channels on macOS without bot invitations, virtual audio drivers, or cloud servers using ScreenCaptureKit.
Mac Dual-Mic Beamforming: Acoustic Isolation
How Apple Silicon studio microphone arrays perform hardware beamforming, delay-and-sum spatial filtering, and near-field acoustic voice extraction.
Hardening Electron: Zero RCE Desktop Sandbox
Comprehensive engineering guide to hardening desktop Electron applications, enforcing context isolation, validating IPC boundaries, and implementing Local-Only Mode.
Enterprise Data Retention: Local-First Setup
How enterprise engineering organizations enforce strict data retention policies, eliminate third-party SaaS exposure, and satisfy SOC 2 on local-first workstations.
FileVault & xattr Quarantine: Vault Security
Deep forensic analysis of macOS extended attributes (com.apple.quarantine), FileVault APFS encryption, and securing plain Markdown vaults from untrusted scripts.
Whisper Custom Vocabulary: Biasing & Prompting
How to eliminate Whisper hallucinations and enforce domain-specific technical vocabulary, acronyms, and company nomenclature using initial prompt biasing.
HIPAA & GDPR in Meeting Recording: Legal Guide
Comprehensive legal and technical guide to HIPAA and GDPR in call recording: Protected Health Information (PHI), eliminating BAAs, and local AI.
llama.cpp Metal Offloading: Quantization on Mac
Deep systems engineering guide to running local LLMs via llama.cpp on macOS: Metal shader pipelines, unified memory offloading, and GGUF quantization.
Zero-Hallucination LLM Prompts for Meeting Notes
Engineering guide to designing zero-hallucination structured extraction prompts for meeting action items, decisions, and summaries using local Ollama models.
Local RAG for Notes: sqlite-vec on macOS
Architectural guide to building on-device Retrieval-Augmented Generation (RAG) across 10,000 Markdown meeting notes using sqlite-vec and local embeddings.
ScreenCaptureKit: Process Audio Stream Filter
Advanced systems guide to ScreenCaptureKit process-level audio isolation: SCContentFilter, excluding background audio, and zero-latency PCM ring buffers.
Validating Markdown Frontmatter With TypeScript
Implement strict TypeScript schema validation for Markdown frontmatter. Parse YAML metadata safely with Zod, unified, and remark in automated note pipelines.
Engineering Markdown Tables: Keyboard & AST
How to engineer a spreadsheet-like Markdown table editor: keyboard navigation state machines, TSV clipboard ingestion, and AST serialization.
Obsidian Canvas JSON Schema: Graph AST Traversal
Deep specification analysis of the Obsidian Canvas 1.0 JSON format: nodes, edges, text cards, file transclusions, and high-performance AST traversal algorithms.
Automating Markdown Vaults: Ripgrep, FZF & Shell
How to automate and query 50,000-note Markdown vaults with Unix command-line utilities: ripgrep, fzf, jq, and POSIX shell pipelines.
Record Slack Huddles on Mac: Botless Guide
How to record and transcribe Slack Huddles on macOS without bots, virtual audio loopbacks, or cloud proxy servers using ScreenCaptureKit.
SOC 2 Type II for Local-First Desktop Software
How enterprise engineering organizations achieve SOC 2 Type II compliance and satisfy Trust Services Criteria using local-first storage and zero-cloud architecture.
Subpoena Resistance in Notes: Local vs Cloud
Legal and architectural analysis of civil subpoenas, third-party discovery, and Fourth Amendment protections in local-first vs cloud AI meeting notes.
Voice Activity Detection: Silero vs WebRTC
Empirical benchmark comparing Silero VAD and WebRTC VAD on Apple Silicon: latency, false alarm rate, speech clipping, and ANE throughput.
Record Cisco Webex on Mac: Botless Guide
How to record and transcribe Cisco Webex conferences on macOS without bots, bypass enterprise tenant recording blocks, and store Markdown in local vaults.
Acoustic Echo Cancellation in Call Recorders
Deep DSP guide to acoustic echo cancellation (AEC), spectral noise suppression (NS), and double-talk detection in desktop call recording.
Record Whereby & Around Calls: Botless Guide
Architectural guide to capturing Whereby and Around video calls on macOS: user-space audio taps, process isolation, and local Markdown vault delivery.
Quantizing Whisper on Mac: FP16 vs INT8
Comprehensive engineering benchmark of Whisper speech transformer quantization for Apple Silicon: FP16, INT8, Core ML ANE matrix kernels, and WER accuracy.
Whisper Turbo vs Large v3: Accuracy Benchmarks
Empirical benchmark comparing OpenAI Whisper Large v3 Turbo and Large v3 on Apple Silicon: Word Error Rate, latency, memory footprint, and ANE throughput.
Wikilink Graph Indexing: Graph Algorithms
How to index and query 50,000-note wikilink knowledge graphs with sub-millisecond latency: adjacency lists, reverse indexes, and SQLite FTS5.
Acoustic Noise Benchmarks and Whisper WER
Comprehensive word error rate benchmarks for local Whisper models across ambient cafe noise, air conditioning hum, and cross-talk meeting conditions.
Zettelkasten Meeting Notes: Permanent Records
How to transform ephemeral meeting minutes into atomic Zettelkasten permanent notes, build bidirectional wikilink graphs, and eliminate note debt.
Legal Ethics in AI Meeting Transcripts
Comprehensive legal analysis of attorney-client privilege, work product doctrine, third-party disclosure, and cloud AI notetakers.
Best Markdown Note Apps for Mac
Comparative benchmark and analysis of Obsidian, Logseq, Bear, and local-first Markdown editors for Mac note-takers and engineers.
Real Cost of AI and Voice in Obsidian
Comprehensive cost, security, and maintenance breakdown of cloud plugins versus native on-device speech in Obsidian vaults.
One Meeting Eight Notetakers Teardown
Comparative transcript accuracy, hallucination rates, and Markdown output quality across eight Mac meeting note assistants.
Private Granola Alternatives for Mac
Comprehensive evaluation of private, local-first meeting notetakers for Mac users seeking alternatives to cloud-hosted Granola.
Local AI Meeting Assistant on Mac
Architectural guide to running air-gapped speech recognition and LLM meeting summaries entirely on Apple Silicon hardware.
Mac Speech to Text Engineering Guide
Engineering guide for developers building high-throughput offline speech-to-text on macOS using Whisper, CoreML, and Metal.
Markdown Frontmatter Templates Guide
Mastering YAML frontmatter schemas and metadata templating for automated meeting notes, Dataview queries, and PKM workflows.
Meeting Recording Consent Laws Guide
Global legal guide to one-party and two-party audio recording consent, wiretap acts, and corporate privacy compliance.
Obsidian Meeting Notes Complete Guide
Step-by-step architecture for capturing live meetings, transcribing audio, and linking discussion notes in an Obsidian vault.
Offline Whisper Transcription macOS Guide
Comprehensive tutorial on setting up, optimizing, and running OpenAI Whisper locally on Apple Silicon Macs without cloud servers.
Ollama Local LLM Meeting Summaries
Architectural guide to running Ollama locally on Apple Silicon to extract action items, summaries, and structured JSON from meetings.
60-Minute Meeting Packet Capture
Empirical network traffic audit of on-device recording versus cloud AI notetakers during a 60-minute meeting on Apple Silicon.
Record Google Meet Without Bots on Mac
How to record and transcribe Google Meet calls in Safari, Chrome, and Arc without external bots or Google Workspace licenses.
Record Microsoft Teams Without Bots
How to record Microsoft Teams meetings on macOS privately without compliance bots, tenant admin blocks, or cloud storage fees.
Record Zoom Calls Without a Bot on Mac
Technical guide to recording Zoom meetings on macOS silently without participant bots, third-party extensions, or cloud uploads.
ScreenCaptureKit Audio Capture Guide
Complete architectural implementation of botless macOS system audio recording using Apple ScreenCaptureKit and Swift.
SQLite FTS5 Full-Text Search in Notes
Technical implementation of SQLite FTS5 for sub-millisecond full-text search, BM25 ranking, and tokenization across Markdown vaults.
State of Local-First Notes Architecture
Technical analysis of file-based versus database storage architectures, data durability, and lock-in across note systems.
Whisper on Apple Silicon Benchmarks
Empirical speed, memory, and word error rate benchmarks for OpenAI Whisper across M1, M2, M3, and M4 Apple Silicon chips.
Experience sovereign on-device notes.
Download the signed macOS build or test all 360 Markdown templates with zero cloud accounts.