f-strings need an "f" in front.

app.py

@@ -36,7 +36,7 @@ def get_path_to_wav_format(uploaded_file):
     new_desired_path = actual_file_path.with_suffix(".wav")
     encoding="PCM_S" # Prevent encoding errors. https://stackoverflow.com/questions/60352850/wave-error-unknown-format-3-arises-when-trying-to-convert-a-wav-file-into-text
     bits_per_sample=16
-    st.info("Allosaurus requires .wav files. Converting with torchaudio, encoding={encoding}, bits_per_sample={bits_per_sample}")
+    st.info(f"Allosaurus requires .wav files. Converting with torchaudio, encoding={encoding}, bits_per_sample={bits_per_sample}")
     waveform, sample_rate = torchaudio.load(actual_file_path)
     st.info(f"Uploaded file sample_rate: {sample_rate}")
     torchaudio.save(new_desired_path, waveform, sample_rate,