+
+option "channels" c
+#~~~~~~~~~~~~~~~~~~
+"specify number of channels"
+int typestr = "num"
+default = "2"
+optional
+
+option "sample-rate" s
+#~~~~~~~~~~~~~~~~~~~~~
+"force given sample rate"
+int typestr = "num"
+default = "44100"
+optional
+
+option "sample-format" f
+#~~~~~~~~~~~~~~~~~~~~~~~
+"specify sample format"
+# This must match the enum sample_format of para.h
+values = "S8", "U8", "S16_LE", "S16_BE", "U16_LE", "U16_BE" enum
+default = "S16_LE"
+optional
+