Fixed assert in octave filter

src/lasp/lasp_octavefilter.py

@@ -33,8 +33,10 @@ class OverallFilterBank:
         """
         Filter input data
         """
-        assert data.ndim == 2
+        if data.ndim == 1:
-        assert data.shape[1] == 1, "invalid number of channels, should be 1"
+            data = data[:, None]
+        elif data.ndim == 2:
+            assert data.shape[1] == 1, "invalid number of channels, should be 1"
 
         if data.shape[0] == 0:
             return {}