Extends notebooks/OmniVoice_Studio_Colab.ipynb (setup cells 1-7 unchanged —
owner-verified on a real T4) with a Part 2 feature tour: one self-contained,
idempotent cell per feature, inline playback, honest runtime notes, loud
failures pointing at the backend log. Covers multilingual TTS (/generate),
zero-shot cloning (ref_audio multipart, incl. a commented own-voice upload
variant), voice design (/design/describe -> instruct), voice profiles
(save/list/reuse by id), TTS->ASR round trip (/transcribe), AI-watermark
detection with a generated-vs-plain-tone contrast (/watermark/*), the
OpenAI-compatible /v1 audio API via the official openai client, a two-voice
story (/longform/render SSE), a chaptered m4b audiobook (/audiobook SSE),
an optional miniature EN->ES video dub (upload -> prep poll -> transcribe ->
translate -> generate -> mux), and vocal-isolation stems off the dub job.
Every endpoint verified against the router sources and the 254-route
inventory. README/README_CN section text and the CHANGELOG entry now
describe the expanded scope.
debpalash
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