diff --git a/src/timescoring/visualization.py b/src/timescoring/visualization.py
index 44e0816..023467d 100644
--- a/src/timescoring/visualization.py
+++ b/src/timescoring/visualization.py
@@ -1,6 +1,7 @@
 import matplotlib.pyplot as plt
 from matplotlib.axes import Axes
 import matplotlib.colors as mc
+import matplotlib.ticker as ticker
 import colorsys
 import numpy as np
 
@@ -105,8 +106,10 @@ def plotEventScoring(ref: Annotation, hyp: Annotation,
 
     # Plot REF TP & FN
     for event in score.ref.events:
+        start_idx = int(round(event[0] * score.fs))
+        end_idx = int(round(event[1] * score.fs))
         # TP
-        if np.any(score.tpMask[round(event[0] * score.fs):round(event[1] * score.fs)]):
+        if np.any(score.tpMask[start_idx:end_idx]):
             color = 'tab:green'
         else:
             color = 'tab:purple'
@@ -115,11 +118,13 @@ def plotEventScoring(ref: Annotation, hyp: Annotation,
 
     # Plot HYP TP & FP
     for event in score.hyp.events:
+        start_idx = int(round(event[0] * score.fs))
+        end_idx = int(round(event[1] * score.fs))
         # FP
-        if np.all(~score.tpMask[round(event[0] * score.fs):round(event[1] * score.fs)]):
+        if np.all(~score.tpMask[start_idx:end_idx]):
             _plotEvent([event[0], event[1] - (1 / ref.fs)], [0.5, 0.5], 'tab:red', ax)
         # TP
-        elif np.all(score.tpMask[round(event[0] * score.fs):round(event[1] * score.fs)]):
+        elif np.all(score.tpMask[start_idx:end_idx]):
             ax.plot([event[0], event[1] - (1 / ref.fs)], [0.5, 0.5],
                     color='tab:green', linewidth=5, solid_capstyle='butt', linestyle='solid')
         # Mix TP, FP