@@ 119,7 119,8 @@ end
      spacing is 21.5Hz, which is mapped linearly for bins 0-34 (0 to
      732Hz), and logarithmically for the remaining bins (midi notes 79
      to 127, bins 35 to 83), where all energy above note 127 is mapped
-     into the final bin."
+     into the final bin." (all assuming reference 440Hz; midi note 127
+     corresponds to 12544Hz)
 *)
 functor SemitoneishFeatureBlockStreamFn (S : FREQUENCY_DOMAIN_BLOCK_STREAM) :
         sig