Set seconds parameter of generate_and_display to -1

audio.py

@@ -138,7 +138,7 @@ def generate_and_display(model: VAE,
                          out_file: str=None, 
                          z_sample: tf.Tensor=None, 
                          velocity: int=50, 
-                         seconds: int=120) -> display.Audio:
+                         seconds: int=-1) -> display.Audio:
   """
   Generate a song, (optionally) save it and display it.