Update app.py

app.py

@@ -43,7 +43,7 @@ def infer_music(lrc, ref_audio_path, text_prompt, current_prompt_type, seed=42,
     vocal_flag = False
     try:
         lrc_prompt, start_time, end_frame, song_duration = get_lrc_token(max_frames, lrc, tokenizer, Music_Duration, device)
-        if current_prompt_type == 'audio':
+        if ref_audio_path is not None:
             style_prompt, vocal_flag = get_audio_style_prompt(muq, ref_audio_path)
         else:
             style_prompt = get_text_style_prompt(muq, text_prompt)