Add x and y lims

utils.py

@@ -159,9 +159,11 @@ def dataframe_to_pianoroll_img(df):
     ax.scatter(df.start_time, df.pitch, c="white")
     for _, row in df.iterrows():
         ax.add_patch(Rectangle(
-            (row["start_time"], row["pitch"]), 
-            row["duration"], 0.01, color="white"
+            (row["start_time"], row["pitch"]-0.4), 
+            row["duration"], 0.4, color="white"
         ))
+    ax.set_xlim(0, 25)
+    ax.set_ylin(30, 100)
     plt.xlabel('Seconds', fontsize=18)
     plt.ylabel('MIDI pitch', fontsize=16)
     return fig