diff --git a/contrib/mem-pattern-explorer/pattern_vis.py b/contrib/mem-pattern-explorer/pattern_vis.py
index 10eff23067e9340137debefde885ef1d3835c9e8..a9e48c79dd4d4764ea296aad54e7d8a016f6bcd1 100644
--- a/contrib/mem-pattern-explorer/pattern_vis.py
+++ b/contrib/mem-pattern-explorer/pattern_vis.py
@@ -144,7 +144,7 @@ class Array:
                 dtype=np.float32)
         shaped_array.reshape(-1, self.nattributes)[:nelements] = self.array
 
-        modulation = np.exp(-(self.ctx.timestamp-shaped_array[:, :, 0]))
+        modulation = np.exp(-0.75*(self.ctx.timestamp-shaped_array[:, :, 0]))
 
         subgroup = shaped_array[:, :, 1]/(self.ctx.nsubgroups()-1)