Update app.py

I've made two changes:
1. **Line 167:** Changed `type="file"` to `type="filepath"` to satisfy the version of Gradio we have.
2. **Lines 100-111:** Updated the `render_midi` function to reflect that the input will now *always* be a filepath string, which simplifies the logic.

app.py

@@ -75,10 +75,10 @@ def extract_examples():
         logger.error(f"Error extracting examples: {e}", exc_info=True)
         return [], f"⛔ **Error:** Could not extract examples. See console logs."
 
-
-def render_midi(midi_file_obj, progress=gr.Progress(track_tqdm=True)):
+def render_midi(midi_file_path, progress=gr.Progress(track_tqdm=True)):
     """
     Renders a MIDI/KAR file to audio, now with progress updates and feedback.
+    The input `midi_file_path` is always a string filepath.
     """
     try:
         # --- 1. Validation and Setup (Progress: 0% -> 20%) ---
@@ -92,14 +92,13 @@ def render_midi(midi_file_obj, progress=gr.Progress(track_tqdm=True)):
             )
         progress(0.1, desc="SoundFont found. Checking input...")
 
-        if hasattr(midi_file_obj, 'name'):
-            input_midi_path = midi_file_obj.name
-            logger.info(f"Processing uploaded file: {midi_file_obj.name}")
-        elif isinstance(midi_file_obj, str):
-            input_midi_path = midi_file_obj
-            logger.info(f"Processing example file: {input_midi_path}")
+        # Simplified logic: Input is always a filepath string
+        if isinstance(midi_file_path, str):
+            input_midi_path = midi_file_path
+            logger.info(f"Processing input file: {input_midi_path}")
         else:
-            raise gr.Error("Invalid input file type.")
+            logger.error(f"Invalid input file type: {type(midi_file_path)}")
+            raise gr.Error(f"Invalid input file type: {type(midi_file_path)}")
         progress(0.2, desc="Input file OK. Preparing output...")
 
         # --- 2. Create Temp File (Progress: 20% -> 30%) ---
@@ -164,7 +163,7 @@ with gr.Blocks() as app:  # <-- I've removed theme=gr.themes.Soft()
             file_input = gr.File(
                 label="Upload .midi, .kar, or .mid file", # <-- Updated this line
                 file_types=[".midi", ".kar", ".mid"], # <-- Updated this line
-                type="file"
+                type="filepath" # <-- Changed from "file" to "filepath"
             )
             submit_btn = gr.Button("Render Audio", variant="primary")