fixed bugs with sample inputs

app.py

@@ -29,6 +29,7 @@ def main():
   st.markdown(title, unsafe_allow_html=True)
 
   sample_files = {
+    'None': '',
     'Stewie Griffin': 'sample_inputs/stewie.wav',
     'Donald Trump': 'sample_inputs/trump.wav',
     'Joe Rogan': 'sample_inputs/rogan.wav'
@@ -38,11 +39,14 @@ def main():
   uploaded_file = st.file_uploader('Add an audio file of the voice you want to clone...', type=['wav'])
   selected_sample = st.selectbox('Or choose a sample:', list(sample_files.keys()))
   
-  speaker_file = sample_files[selected_sample] if uploaded_file is None else uploaded_file
+  if selected_sample is not 'None':
+    speaker_file = sample_files[selected_sample] 
+  if uploaded_file is not None:
+    speaker_file = uploaded_file
 
   if speaker_file:
     st.header('Reference Audio')
-    st.audio(uploaded_file, format='audio/wav')
+    st.audio(speaker_file, format='audio/wav')
 
     # Input text 
     text_input = st.text_input('What do you want your character to say? (Alphabet letters only, DO NOT INCLUDE PUNCTUATION)')