UPDATE

app.py

@@ -69,7 +69,7 @@ with gr.Blocks(title="Audio Fusion") as iface:
     # 8d Effect and its arguments
     with gr.Tab("8d Effect"):
         d_check = gr.Checkbox(label="Apply 8D effect")
-        with gr.Column():
+        with gr.Row():
             pan = gr.Slider(label="8D - Pan Boundary", minimum=0, maximum=100, value=100)
             jump = gr.Slider(label="8D - Jump Percentage", minimum=1, maximum=100, value=5)
             time = gr.Slider(label="8D - Time L to R (s)", minimum=1, maximum=30, value=10)
@@ -78,13 +78,13 @@ with gr.Blocks(title="Audio Fusion") as iface:
     # SLowed Effect and its arguments
     with gr.Tab("Slowed Effect"):
         speed_check = gr.Checkbox(label="Apply slowed effect"),
-        with gr.Column():
+        with gr.Row():
             speed = gr.Slider(label="Slowed - Speed Multiplier", minimum=0.1, maximum=4, step=0.01, value=0.92),
     
     # Reverb Effect and its arguments
     with gr.Tab("Reverb Effect"):
         reverb_check = gr.Checkbox(label="Apply reverb effect"),
-        with gr.Column():
+        with gr.Row():
             room = gr.Slider(label="Reverb - Room Size", minimum=0, maximum=2, step=0.01, value=0.8),
             damp = gr.Slider(label="Reverb - Damping", minimum=0, maximum=2, value=1),
             width = gr.Slider(label="Reverb - Width", minimum=0, maximum=2, step=0.1, value=0.5),
@@ -92,7 +92,7 @@ with gr.Blocks(title="Audio Fusion") as iface:
             dry = gr.Slider(label="Reverb - Dry Level", minimum=0, maximum=2, step=0.1, value=0.8),
 
     inputs = [input_audio, d_check, pan, jump, time, volx, speed_check, speed, reverb_check, room, damp, width, wet, dry]
-    output = gr.Audio(label="Download processed music", type="filepath")
+    output = [gr.Audio(label="Download processed music", type="filepath")]
     
     btn = gr.Button("Run")
     btn.click(fn=process_audio, inputs=inputs, outputs=output, api_name="AudioFusion")