Update app.py

app.py

@@ -144,25 +144,29 @@ def get_supported_languages_display() -> str:
 """
 
 def format_for_singing(lyrics: str) -> str:
-    return f"""
-You are a playful children's song singer.
-Do NOT speak normally.
-Perform this rhythmically and melodically like a song.
-
-Rules:
-- Stretch vowels
-- Follow rhythm
-- Pause between lines
-- Raise pitch on questions
-- Sound playful and musical
+    """
+    Encode melody directly into text for Chatterbox.
+    NO instructions. ONLY singable text.
+    """
+    lines = []
+    for line in lyrics.splitlines():
+        line = line.strip()
+        if not line:
+            continue
+
+        # simple vowel stretching
+        line = (
+            line.replace("a", "aa")
+                .replace("e", "ee")
+                .replace("i", "ii")
+                .replace("o", "oo")
+                .replace("u", "uu")
+        )
 
-Start with a soft humming intro:
-hmm-hmm-hmm ♪
+        lines.append(f"{line} ♪ ...")
 
-Lyrics (sing line by line):
+    return "\n".join(lines)
 
-{lyrics}
-"""
 
 DEVICE = "cpu"
 MODEL = None