Update app.py

app.py

@@ -131,6 +131,11 @@ def apply_bitcrush(audio, bit_depth=8):
     downsampled = np.round(samples / (32768 / max_val)).astype(np.int16)
     return array_to_audiosegment(downsampled, audio.frame_rate // 2, channels=audio.channels)
 
+def formant_correct(audio, shift=1.0):
+    samples, sr = audiosegment_to_array(audio)
+    corrected_samples = librosa.effects.pitch_shift(samples, sr=sr, n_steps=shift)
+    return array_to_audiosegment(corrected_samples.astype(np.int16), sr, channels=audio.channels)
+
 # === Loudness Matching ===
 
 try:
@@ -699,13 +704,8 @@ with gr.Blocks() as demo:
         formant_shift = gr.Slider(minimum=-2, maximum=2, value=1.0, step=0.1, label="Formant Shift")
         formant_output = gr.Audio(label="Natural-Sounding Vocal", type="numpy")
         formant_btn = gr.Button("Apply Correction")
-        
-def formant_correct(audio, shift=1.0):
-    samples, sr = audiosegment_to_array(audio)
-    corrected_samples = librosa.effects.pitch_shift(samples, sr=sr, n_steps=shift)
-    return array_to_audiosegment(corrected_samples.astype(np.int16), sr, channels=audio.channels)
-        
-
+        formant_btn.click(fn=formant_correct, inputs=[formant_audio, formant_shift], outputs=formant_output)
+     
     # Tab: Voice Swap / Cloning
     with gr.Tab("🔁 Voice Swap / Cloning"):
         source_voice = gr.File(label="Source Voice Clip")