UNDER THE HOOD

System Architecture

Under the hood: local Electron runtime, hardware media pipelines, and on-device AI.

6 min readApplies to version 0.3.7

Klamra’s four layers

LayerTech StackResponsibility

UI LayerReact + TypeScriptTimeline, transcript view, editor controls

Local APIExpress (127.0.0.1)Project state, workload queue, settings

Media PipelineFFmpeg + VideoToolbox / Media FoundationHardware decoding, proxies, export rendering

AI EnginesWhisper + MossFormer2 MLX / DPDFNet2On-device transcription and Pure Voice processing on Apple Silicon and Windows x64

Resource queue & throttling

All heavy workloads (transcription, proxy generation, voice enhancement, and export) pass through a single prioritized queue, ensuring the timeline remains fluid and responsive.

011 · Interactive editing

022 · Final export

033 · A/B audition

044 · Background Pure Voice processing

Project state & non-destructive cuts

Your edits are stored as non-destructive JSON state deltas. The source media remains untouched, allowing instant reversion of cuts or changes at any time.

Security boundaries

Local server listens exclusively on loopback 127.0.0.1.
Ephemeral random token generated on each app launch.
Signed and notarized with Apple Developer ID, alongside verified Windows packages.