Fix lyrics format conversion for YuEGP compatibility

- Convert **VERSE**, **CHORUS** format to [VERSE], [CHORUS] format
- Remove AI commentary and keep only actual lyrics content
- Add regex processing to clean lyrics for YuE model parsing
- Add debugging output to track conversion process

app.py

@@ -304,22 +304,44 @@ def generate_music_spaces(lyrics: str, genre: str, mood: str, progress=gr.Progre
             genre_file.write(f"instrumental,{genre},{mood},male vocals")
             genre_file_path = genre_file.name
         
-        # Debug: Print lyrics content for debugging
-        print(f"🐛 DEBUG - Raw lyrics input: '{lyrics}'")
-        print(f"🐛 DEBUG - Formatted lyrics: '{formatted_lyrics}'")
-        print(f"🐛 DEBUG - Formatted lyrics length: {len(formatted_lyrics)}")
+        # Convert lyrics format for YuEGP compatibility
+        # YuEGP expects [VERSE], [CHORUS] format, but our AI generates **VERSE**, **CHORUS**
+        import re
+        
+        # Extract only the actual lyrics content, removing AI commentary
+        formatted_lyrics_for_yue = formatted_lyrics
+        
+        # Convert **VERSE 1** to [VERSE], **CHORUS** to [CHORUS], etc.
+        formatted_lyrics_for_yue = re.sub(r'\*\*(VERSE\s*\d*)\*\*', r'[\1]', formatted_lyrics_for_yue)
+        formatted_lyrics_for_yue = re.sub(r'\*\*(CHORUS)\*\*', r'[\1]', formatted_lyrics_for_yue)
+        formatted_lyrics_for_yue = re.sub(r'\*\*(BRIDGE)\*\*', r'[\1]', formatted_lyrics_for_yue)
+        formatted_lyrics_for_yue = re.sub(r'\*\*(OUTRO)\*\*', r'[\1]', formatted_lyrics_for_yue)
+        
+        # Remove AI commentary (lines that don't contain actual lyrics)
+        lines = formatted_lyrics_for_yue.split('\n')
+        clean_lines = []
+        in_song = False
+        
+        for line in lines:
+            line = line.strip()
+            # Start collecting from first section marker
+            if re.match(r'\[(VERSE|CHORUS|BRIDGE|OUTRO)', line):
+                in_song = True
+            # Stop at AI commentary
+            if in_song and line and not line.startswith('[') and any(phrase in line.lower() for phrase in ['how do you like', 'would you like', 'let me know', 'take a look']):
+                break
+            if in_song:
+                clean_lines.append(line)
+        
+        formatted_lyrics_for_yue = '\n'.join(clean_lines).strip()
+        
+        print(f"🐛 DEBUG - Original lyrics length: {len(formatted_lyrics)}")
+        print(f"🐛 DEBUG - Converted lyrics for YuE: '{formatted_lyrics_for_yue}'")
+        print(f"🐛 DEBUG - Converted lyrics length: {len(formatted_lyrics_for_yue)}")
         
         with tempfile.NamedTemporaryFile(mode='w', suffix='.txt', delete=False) as lyrics_file:
-            lyrics_file.write(formatted_lyrics)
+            lyrics_file.write(formatted_lyrics_for_yue)
             lyrics_file_path = lyrics_file.name
-            
-        print(f"🐛 DEBUG - Lyrics file path: {lyrics_file_path}")
-        
-        # Debug: Read back the file to verify what was written
-        with open(lyrics_file_path, 'r') as verify_file:
-            written_content = verify_file.read()
-            print(f"🐛 DEBUG - Content written to file: '{written_content}'")
-            print(f"🐛 DEBUG - Written content length: {len(written_content)}")
         
         progress(0.2, desc="Setting up generation...")