Update app.py

app.py

@@ -81,7 +81,7 @@ num_epoch = st.number_input("Number of epochs:",
                             value=1,
                             )
 
-chord_duration = st.number_input("Custom chord duration (leave zero for auto-calculation):",
+chord_duration = st.number_input("Custom chord duration is seconds (leave zero for auto-calculation):",
                                  min_value=0.0,
                                  max_value=1000.0,
                                  step=0.0001,