diff --git a/scripts/demo.py b/scripts/demo.py
index 6272d9d1..493657ac 100644
--- a/scripts/demo.py
+++ b/scripts/demo.py
@@ -24,6 +24,7 @@
     BandStopFilter,
     TimeInversion,
     Padding,
+    VTLP,
 )
 from torch_audiomentations.augmentations.shuffle_channels import ShuffleChannels
 from torch_audiomentations.core.transforms_interface import ModeNotSupportedException
@@ -163,6 +164,7 @@ def __exit__(self, type, value, traceback):
             {"get_instance": lambda: PolarityInversion(mode=mode, p=1.0), "num_runs": 1},
             {"get_instance": lambda: Shift(mode=mode, p=1.0), "num_runs": 5},
             {"get_instance": lambda: ShuffleChannels(mode=mode, p=1.0), "num_runs": 5},
+            {"get_instance": lambda: VTLP(mode=mode, p=1.0), "num_runs": 5},
             {"get_instance": lambda: TimeInversion(mode=mode, p=1.0), "num_runs": 1},
         ]
 
diff --git a/torch_audiomentations/augmentations/vtlp.py b/torch_audiomentations/augmentations/vtlp.py
index 3c83be98..7470aef7 100644
--- a/torch_audiomentations/augmentations/vtlp.py
+++ b/torch_audiomentations/augmentations/vtlp.py
@@ -55,8 +55,6 @@ def __init__(
         )
         if min_warp_factor >= max_warp_factor:
             raise ValueError("max_warp_factor must be > min_warp_factor")
-        if not sample_rate:
-            raise ValueError("sample_rate is invalid.")
 
         self.min_warp_factor = min_warp_factor
         self.max_warp_factor = max_warp_factor