1 files changed, 44 insertions, 2 deletions
diff --git a/converter/config.py b/converter/config.py
index ec84986..f795520 100644
--- a/converter/config.py
+++ b/converter/config.py
@@ -7,7 +7,7 @@ be run from any working directory.
 
 from pathlib import Path
 
-# Project root (directory containing audiobook_converter.py)
+# Project root (directory containing audiobook.py)
 BASE_DIR = Path(__file__).resolve().parent.parent
 
 # =============================================================================
@@ -19,6 +19,48 @@ VOICE_MODE_CLONE = "voice_clone"
 VOICE_MODES = (VOICE_MODE_CUSTOM, VOICE_MODE_CLONE)
 
 # =============================================================================
+# TTS LANGUAGE SETTINGS
+# =============================================================================
+# Languages understood by the Qwen3-TTS API. The Gradio demo silently falls
+# back to "Auto" for unrecognized values, so languages are validated
+# client-side (see converter.tts.normalize_language) before reaching the API.
+# Display names must match the demo dropdown exactly.
+
+TTS_LANGUAGES = (
+    "Auto",
+    "Chinese",
+    "English",
+    "German",
+    "Italian",
+    "Portuguese",
+    "Spanish",
+    "Japanese",
+    "Korean",
+    "French",
+    "Russian",
+)
+
+# Short aliases accepted on the command line (ISO 639-1 codes and common
+# shorthands), mapped to the display names above.
+TTS_LANGUAGE_ALIASES = {
+    "zh": "Chinese",
+    "en": "English",
+    "de": "German",
+    "it": "Italian",
+    "pt": "Portuguese",
+    "es": "Spanish",
+    "ja": "Japanese",
+    "ko": "Korean",
+    "fr": "French",
+    "ru": "Russian",
+    "zh-cn": "Chinese",
+    "zh-tw": "Chinese",
+    "pt-br": "Portuguese",
+    "en-us": "English",
+    "en-gb": "English",
+}
+
+# =============================================================================
 # QWEN API CONFIGURATION
 # =============================================================================
 
@@ -82,7 +124,7 @@ HEARTBEAT_INTERVAL_SECONDS = 30  # Print "still working" this often during a chu
 # AUDIO OUTPUT SETTINGS
 # =============================================================================
 
-AUDIO_FORMAT = "mp3"  # Default output container
+AUDIO_FORMAT = "m4b"  # Default output container
 AUDIO_FORMATS = ("mp3", "m4b", "ogg", "flac")
 AUDIO_BITRATE = "128k"