changed message to be shown when no text recognized

app.py

@@ -304,8 +304,8 @@ def on_click_transcribe():
         with st.spinner("Transcribing audio... this may take up to 30 seconds"):
             option_1_text, option_2_text = transcribe_audio(
                     )
-            st.session_state.option_1 = option_1_text
-            st.session_state.option_2 = option_2_text
+            st.session_state.option_1 = option_1_text if option_1_text else "* inaudible *"
+            st.session_state.option_2 = option_2_text if option_2_text else "* inaudible *"
             st.session_state.transcribed = True
             st.session_state.option_1_model_name_state = ""
             st.session_state.option_2_model_name_state = ""