1. The Architecture of Sema

Sema has a modular, decoupled and extensible architecture. Its core blocks, such as the audio engine, worker threads, and presentation layer are self-contained components that communicate using a message-oriented subsystem (i.e. a publish-subscribe model with a message protocol).

To make Sema easily extensible, its frontend architecture is mostly a shell which is populated with dynamic content on load or on request from JSON web services.

This wiki provides a walkthrough of most important architectural decisions and core components of Sema. It is structured as follows:

• the publish-subscribe message-oriented system.

• the WAAPI AudioWorklet-based signal engine

• worker threads for machine learning and language interpretation workflows

• application state management with Svelte stores.

• the presentation layer and user interface components

• how Sema implements and consumes web services.

• utilities and workflow to debug Sema