Update README.md to fix lang_code error

README.md

@@ -45,15 +45,16 @@ To generate audio with an LLM use:
 ```python
 from mlx_audio.tts.generate import generate_audio
 
-# Example: Generate an audiobook chapter as audio
+# Example: Generate an audiobook chapter as mp3 audio
 generate_audio(
-    text="In the beginning, the universe was created...",
+    text=("In the beginning, the universe was created...\n"
+        "...or the simulation was booted up."),
     model_path="prince-canuma/Kokoro-82M",
     voice="af_heart",
     speed=1.2,
-    lang_code="en",
+    lang_code="a", # Kokoro: (a)f_heart, or comment out for auto
     file_prefix="audiobook_chapter1",
-    audio_format="wav",
+    audio_format="mp3",
     sample_rate=24000,
     join_audio=True,
     verbose=True  # Set to False to disable print messages

mlx_audio/tts/models/kokoro/kokoro.py

@@ -246,7 +246,7 @@ def generate(
         text: str,
         voice: str = None,
         speed: float = 1.0,
-        lang_code: str = "af",
+        lang_code: str = "a",
         split_pattern: str = r"\n+",
         **kwargs,
     ):