Update app.py from anycoder

app.py

@@ -91,8 +91,9 @@ def generate_music(prompt, duration, temperature, top_k):
             top_k=top_k
         )
 
-        # Get sampling rate from model config
-        sampling_rate = model.config.audio_encoder.sample_rate
+        # Get sampling rate from processor's audio encoder config
+        # MusicGen uses Encodec for audio processing
+        sampling_rate = processor.feature_extractor.sampling_rate
 
         # Convert audio tensor to numpy array
         # MusicGen outputs audio in stereo (2 channels)