feat: experimental support for non-qwen models

1 files changed, 12 insertions, 8 deletions

diff --git a/audiobook.py b/audiobook.py
index 0b3734c..a984a0a 100755
--- a/audiobook.py
+++ b/audiobook.py
@@ -4,8 +4,6 @@ Qwen-Based Audiobook Converter
 Converts TXT, PDF and EPUB files into audiobooks using a local Qwen3-TTS server.
 
 Edit converter/config.py to change voice and processing settings.
-
-License: MIT
 """
 
 import argparse
@@ -89,7 +87,10 @@ Examples:
         metavar="LANG",
         help=("Output language for the synthesized speech, e.g. English, Japanese, "
               "or Auto (language names and short codes like en/ja are accepted). "
-              "Defaults to the LANGUAGE setting in converter/config.py (English).")
+              "With --backend audiocpp the language is adapted to the model "
+              "family: sent as a code (e.g. 'en') for families that take one, or "
+              "omitted when the model detects the language itself. Defaults to "
+              "the LANGUAGE setting in converter/config.py (English).")
     )
 
     parser.add_argument(
@@ -120,8 +121,10 @@ Examples:
         default=config.BACKEND,
         help=("TTS server to talk to: the Qwen3-TTS Gradio demos (gradio), the "
               "faster-qwen3-tts OpenAI-compatible server (faster), or an "
-              "audio.cpp audiocpp_server (audiocpp). Defaults to the BACKEND "
-              "setting in converter/config.py (gradio).")
+              "audio.cpp audiocpp_server (audiocpp) hosting any of its TTS "
+              "model families — Qwen3-TTS, Higgs Audio, VoxCPM2, IndexTTS2, "
+              "and more. Defaults to the BACKEND setting in "
+              "converter/config.py (gradio).")
     )
 
     parser.add_argument(
@@ -132,9 +135,10 @@ Examples:
         help=("Voice to request from a server-side voice configuration. faster: "
               "a key in the server's voices.json ('default' when it was started "
               "with --ref-audio). audiocpp: a voice_preset or voice_dir entry "
-              "(cloning); without this flag the audiocpp backend uses a built-in "
-              "CustomVoice speaker instead. Not used by the gradio backend "
-              "(use converter/config.py SPEAKER or --clone there).")
+              "(cloning); required for audio.cpp families without built-in "
+              "speakers (everything except Qwen3-TTS CustomVoice). Not used by "
+              "the gradio backend (use converter/config.py SPEAKER or --clone "
+              "there).")
     )
 
     parser.add_argument(