Documentation Source Inventory

This is the Stage 0 inventory for the documentation refactor described in roadmap/doc-refacturing.md. It captures what the docs should treat as source of truth before the README is reset.

Inventory date: 2026-05-10.

Sources Inspected

Area	Sources
Roadmap and style	roadmap/doc-refacturing.md, D:\Projekte\STT\RealtimeSTT\RealtimeSTT\README.md
Entry docs	README.md, FAQ.md, LICENSE, LICENSING_ADDENDUM.md
Docs site	mkdocs.yml, docs/**
Packaging	setup.py, requirements.txt
Public exports	RealtimeTTS/__init__.py, RealtimeTTS/engines/__init__.py
Stream API	RealtimeTTS/text_to_stream.py, RealtimeTTS/stream_player.py
Engines	RealtimeTTS/engines/*_engine.py
Examples and demos	tests/*.py, example_fast_api/**, example_rvc/**, docker/**

Current Docs Shape

Item	Current state	README reset impact
Root README	README.md is 836 lines and contains project intro, install notes, engine notes, examples, API reference, CUDA notes, testing, licensing, and history.	Reset should follow the compact RealtimeSTT style: short summary, working examples, engine overview, and docs map.
Root FAQ	FAQ.md is the real troubleshooting page.	Move symptom-based troubleshooting into canonical docs later; keep root FAQ stable during the first pass.
English docs	docs/en/ has index.md, installation.md, usage.md, api.md, contributing.md, and faq.md.	These are thinner copies of README material and should not be the long-term English source.
Translations	docs/ has 12 locale directories with the same 6-page shape: ar, de, en, es, fr, hi, it, ja, ko, pt, ru, zh.	Leave them untouched until the English canonical pages settle.
MkDocs nav	mkdocs.yml manually repeats each topic for each language. Language labels appear mojibaked and ar exists on disk but is not listed in mkdocs.yml.	Target nav should be topic-first, English-first, and should not manually duplicate every page per locale.
README language list	README lists en, fr, es, de, it, zh, ja, hi, and ko.	It misses pt and ru from MkDocs and ar from the docs tree. Do not preserve this list as-is in the reset.

Engine Inventory

Export status uses these meanings:

• root: exported from RealtimeTTS/__init__.py.
• engines: exported from RealtimeTTS/engines/__init__.py.

Each concrete engine source listed below now has a focused setup page under docs/engines/. base_engine.py is intentionally excluded because it is the engine base class, not an installable engine.

Engine	Source	Export status	Setup extras observed	Examples/tests observed	Notes
SystemEngine	system_engine.py	root, engines	system, all	tests/simple_test.py, tests/complex_test.py	Low-friction README starter candidate.
AzureEngine	azure_engine.py	root, engines	azure, all	tests/azure_test.py, tests/test_callbacks.py, tests/translator.py	Uses Azure key and region; supports word timings.
ElevenlabsEngine	elevenlabs_engine.py	root, engines	elevenlabs, all	tests/elevenlabs_test.py, tests/advanced_talk.py	Uses MPEG/mpv playback path.
CoquiEngine	coqui_engine.py	root, engines	coqui, all	tests/coqui_test.py, tests/coqui_test_stop.py, example_rvc/**	Local neural voice cloning; needs shutdown guidance.
OpenAIEngine	openai_engine.py	root, engines	openai, all	tests/openai_1.0_test.py, tests/openaitts_test.py, docker/openai-tts-docker/**	README/docs should use current OpenAI examples only.
GTTSEngine	gtts_engine.py	root, engines	gtts, all	tests/gtts_test.py	Free service, no API key.
ParlerEngine	parler_engine.py	root, engines	parler, all	tests/parler_test.py	Extra keeps PyPI-resolvable support deps; upstream Parler package remains a manual Git install.
EdgeEngine	edge_engine.py	root, engines	edge, all	tests/edge_test.py	Uses MPEG/mpv playback path.
StyleTTSEngine	style_engine.py	root, engines	styletts, style, all	tests/style_test.py	Extra covers Python deps; local checkout/model setup is still required.
PiperEngine	piper_engine.py	root, engines	piper, all	tests/piper_test.py	Uses external Piper executable; PIPER_PATH is supported.
KokoroEngine	kokoro_engine.py	root, engines	kokoro, jp, zh, ko, all	tests/kokoro_test.py, tests/kokoro_mix_voices.py	Language extras and word-timing support need exact docs.
OrpheusEngine	orpheus_engine.py	root, engines	orpheus, all	tests/orpheus_test.py	Requires an OpenAI-compatible completions endpoint or local model stack.
ZipVoiceEngine	zipvoice_engine.py	root, engines	zipvoice, all	tests/zipvoice_test.py, docker/zipvoice/**	Extra covers shared deps; source checkout/assets still required.
PocketTTSEngine	pocket_engine.py	root, engines	pockettts, pocket, all	none focused found	Lazy import recommends pip install pocket-tts; docs need status and install caveat.
NeuTTSEngine	neutts_engine.py	root, engines	neutts, neutts-gguf, all	tests/neutts_test.py	GGUF/ONNX fast path still needs optional assets and compatible llama-cpp-python wheels.
CambEngine	camb_engine.py	root, engines	camb, all	tests/camb_test.py	Uses CAMB_API_KEY.
MiniMaxEngine	minimax_engine.py	root, engines	minimax, all	tests/minimax_test.py, tests/test_minimax_engine.py, tests/test_minimax_integration.py	Strongest pytest coverage among cloud engines.
CartesiaEngine	cartesia_engine.py	root, engines	cartesia, all	tests/cartesia_test.py	Uses cartesia==2.0.9.
TypecastEngine	typecast_engine.py	root, engines	typecast, all	none focused found	Uses TYPECAST_API_KEY and optional TYPECAST_VOICE_ID; source arrived from upstream master during release rebase.
FasterQwenEngine	faster_qwen_engine.py	root, engines	qwen, all	tests/faster_qwen_test.py, tests/faster_qwen_emotions.py	Extra name is qwen, not faster-qwen.
OmniVoiceEngine	omnivoice_engine.py	root, engines	omnivoice, all	tests/omnivoice_test.py, tests/omnivoice_emotions.py	Voice cloning and inline voice examples need docs.
LuxTTSEngine	luxtts_engine.py	root, engines	luxtts, all	none focused found	Local checkout/model setup needs verification.
ChatterboxEngine	chatterbox_engine.py	root, engines	chatterbox, all	none focused found	Extra now uses chatterbox-tts; prompt WAV length caveats remain.
SoproTTSEngine	sopro_engine.py	root, engines	sopro, all	none focused found	Uses Hugging Face cache environment variables when configured.
SopranoEngine	soprano_engine.py	root, engines	soprano, all	none focused found	Local neural engine without a focused test found.
MossTTSEngine	moss_tts_engine.py	root, engines	moss, moss-tts, all	none focused found	Extra keeps PyPI-resolvable runtime deps; MOSS-TTS-Nano package/assets, CUDA/CUDNN, and model assets still need care.
ModelsLabEngine	modelslab_engine.py	engines only	modelslab, all	tests/modelslab_test.py	README and tests reference it, but root RealtimeTTS does not export it.

Setup Extras Inventory

Observed setup.py extras:

minimal, all, system, azure, elevenlabs, openai, gtts, coqui, edge, kokoro, camb, minimax, modelslab, cartesia, typecast, orpheus, omnivoice, luxtts, zipvoice, chatterbox, sopro, soprano, neutts, neutts-gguf, pockettts, pocket, styletts, style, parler, moss, moss-tts, piper, qwen, jp, zh, ko.

Packaging mismatches to preserve as follow-ups, not docs assumptions:

• ModelsLabEngine is exported from RealtimeTTS.engines, but not from the root RealtimeTTS lazy export table.
• PiperEngine still needs an external Piper executable and voice model; setup extras cannot install those assets.
• StyleTTSEngine, ZipVoiceEngine, and some MOSS workflows still need local upstream checkouts or model assets even though setup extras now cover their declared Python dependency scaffolding.
• all is broader now, but remains a best-effort Python dependency set; it cannot install OS tools, provider accounts, CUDA wheel choices, or model downloads.
• setup.py declares Python >=3.9, <3.15; docs/en/usage.md still says Python <3.13.
• setup.py prepends custom installation guidance to the README for the PyPI long description. The README reset should decide whether PyPI uses the compact README as-is or a generated long description before editing setup.py.

Runtime Environment Variables

Variable	Observed in	Purpose
OPENAI_API_KEY	OpenAI engine, tests, Docker example	OpenAI API credentials.
AZURE_SPEECH_KEY, AZURE_SPEECH_REGION	Azure examples, FastAPI example, tests	Azure Speech credentials.
ELEVENLABS_API_KEY	ElevenLabs engine, examples, tests	ElevenLabs credentials.
CAMB_API_KEY	CAMB engine and test	CAMB credentials.
MINIMAX_API_KEY	MiniMax engine and pytest files	MiniMax credentials.
CARTESIA_API_KEY	Cartesia engine and test	Cartesia credentials.
MODELSLAB_API_KEY	ModelsLab engine and test	ModelsLab credentials.
PIPER_PATH	Piper engine	External Piper executable path.
COQUI_MODEL_PATH, TTS_HOME, XDG_DATA_HOME	Coqui engine	Local model discovery/cache paths.
HF_HOME, HF_HUB_CACHE	Sopro engine, ZipVoice Docker	Hugging Face cache paths.
CUDNN_PATH	MOSS engine	CUDA/CUDNN library discovery.
TTS_FASTAPI_PORT, WORKERS	FastAPI and Docker examples	Server port and worker count.
ZIPVOICE_PROJECT_ROOT, VOICE_ALPHA_WAV_PATH, VOICE_ALPHA_PROMPT_TEXT, VOICE_BETA_WAV_PATH, VOICE_BETA_PROMPT_TEXT, DEVICE	ZipVoice Docker server	ZipVoice server configuration.
RVC_ASSET_PATH and RVC internals	RVC example	RVC demo asset/model locations.

Public API Docs Mismatches

These are documentation follow-ups for Stage 3 and Stage 4:

• docs/en/api.md omits or under-documents current constructor parameters such as log_characters, on_word, mpv_audio_device, frames_per_buffer, and playout_chunk_size.
• Current source includes volume control (volume property and set_volume), inline voice tags (add_voice, set_voice_tag_delimiters), pause tags (add_pause), and recursive play behavior that the current docs do not cover.
• play_async() defaults fast_sentence_fragment_allsentences=True, while play() defaults it to False; docs should call out this difference.
• force_first_fragment_after_words defaults to 30 in source, while current README/docs material still describes older values in places.
• Sentence delimiter defaults in docs should be re-audited against text_to_stream.py; the existing docs contain mojibake around ellipsis and CJK punctuation.

Tests And Examples Inventory

Area	Current state
Pytest-style tests	tests/test_minimax_engine.py and tests/test_minimax_integration.py contain real pytest tests. The integration file is gated by MINIMAX_API_KEY.
Manual scripts named like tests	tests/test_callbacks.py and tests/test_on_audio_chunk_callback.py execute work at import time and should be documented as manual demos unless refactored later.
Engine demos	Most tests/*_test.py files are engine demos or smoke scripts, often requiring credentials, local models, audio devices, or optional packages.
FastAPI example	example_fast_api/README.md, server.py, async_server.py, and clients are valuable deployment docs inputs.
RVC example	example_rvc/README.md documents XTTS plus RVC post-processing and should remain clearly framed as an example stack.
Docker examples	docker/zipvoice/README.md and docker/openai-tts-docker/Readme.md should be linked from future Docker and engine docs.