diff --git a/lasp/lasp_octavefilter.py b/lasp/lasp_octavefilter.py
index c8e6857..5f29fde 100644
--- a/lasp/lasp_octavefilter.py
+++ b/lasp/lasp_octavefilter.py
@@ -228,6 +228,11 @@ class SosFilterBank:
             xmin: Minimum value for the bands
             xmax: Maximum value for the bands
         """
+        if xmin is None:
+            xmin = self.designer.xs[0]
+        if xmax is None:
+            xmax = self.designer.xs[-1]
+
         self.fs = fs
         self.xs = list(range(xmin, xmax + 1))
         nfilt = len(self.xs)
@@ -290,10 +295,6 @@ class SosThirdOctaveFilterBank(SosFilterBank):
             xmax: Maximum value for the bands
         """
         self.designer = ThirdOctaveBankDesigner(fs)
-        if xmin is None:
-            xmin = self.designer.xs[0]
-        if xmax is None:
-            xmax = self.designer.xs[-1]
         SosFilterBank.__init__(self, fs, xmin, xmax)
 
 
@@ -313,10 +314,6 @@ class SosOctaveFilterBank(SosFilterBank):
             xmax: Maximum value for the bands, if not specified, use maximum
         """
         self.designer = OctaveBankDesigner(fs)
-        if xmin is None:
-            xmin = self.designer.xs[0]
-        if xmax is None:
-            xmax = self.designer.xs[-1]
         SosFilterBank.__init__(self, fs, xmin, xmax)
 
 
diff --git a/lasp/lasp_slm.py b/lasp/lasp_slm.py
index fa0ab43..08058a2 100644
--- a/lasp/lasp_slm.py
+++ b/lasp/lasp_slm.py
@@ -149,7 +149,7 @@ class SLM:
                                        'data': levels[:, [i]],
                                        'x': x}
         if self.include_overall and self.fbdesigner is not None:
-            output['overall'] = {'t': t, 'data': levels[:, i+1], 'x': 0}
+            output['overall'] = {'t': t, 'data': levels[:, [i+1]], 'x': 0}
 
         return output