Add audio transcription workflow (faster-whisper) and gitignore for raw audio

README.md

@@ -32,6 +32,25 @@ A1.2/                        ← added once I move on to the next book
 4. Update `INDEX.md` with a one-line entry for the lesson.
 5. Commit.
 
+## Audio (listening exercises)
+
+Course book audio has no printed transcript (the workbook's back section is
+the *Lösungsschlüssel* — answer key — not a transcript, so that doesn't help
+here). Raw audio files are **not** stored in this repo (see `.gitignore`);
+only their transcripts are, since that's what gives Claude context.
+
+Workflow:
+1. Get the audio files locally (publisher CD/app/download), any folder outside git.
+2. Run `scripts/transcribe.py` (uses `faster-whisper` on GPU) to transcribe them:
+   ```bash
+   pip install faster-whisper
+   python scripts/transcribe.py "<path-to-lesson-audio>" "A1.1/course-book/transcripts/lektion-XX"
+   ```
+3. Skim the `.txt` output for ASR mistakes (names, numbers, fast speech) and fix them.
+4. Reference/paste the transcript into the lesson's `.md` file under "Audio / Listening",
+   or just point at the `transcripts/lektion-XX/*.txt` path — either works, transcripts
+   are small text files so committing them is fine.
+
 ## Adding a new book (e.g. A1.2)
 
 Copy the `A1.1/` folder structure (minus content) into a new `A1.2/` folder