Attempt again to debug.

src/synthesize.py

@@ -78,7 +78,8 @@ def synth_espeakng(text:str, model:str):
         esng = espeakng.Speaker()
         esng.voice = model
         esng.say(text, export_path="test.wav")
-                
+
+        print(os.listdir())
         sampling_rate, wav = wavfile.read('test.wav')
         os.remove("test.wav")