Diff of /mulaclab.m [fc3139] .. [80bb6b] Maximize Restore

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--- a/mulaclab.m
+++ b/mulaclab.m
@@ -686,7 +686,7 @@
 
     if loadFile
       [~, ~, ext] = fileparts(fileName);
-      switch ext
+      switch lower(ext)
         case '.wav'
           % read the orginal signal in a wave file
           [sig.ori, sig.sampFreq, sig.nbBit] =...