+let valid_input_file : string -> bool =
+ fun (file : string) ->
+ let fragments = Str.split (Str.regexp "\.") file in
+ let n = List.length fragments in
+ let extension = List.nth fragments (n - 1) in
+ if extension = "csv" || extension = "wav" then true
+ else false;;
+
+let chk_input_path : string -> bool =
+ fun (path : string) ->
+ let file_in = file_of_path path in
+ valid_input_file file_in;;
+