diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -111,3 +111,7 @@
 ## 0.6.3.0 -- 2020-01-31
 
 * Sixth version revised C. Changed a README.md file to README.markdown. Some documentation improvements.
+
+## 0.6.3.1 -- 2020-02-23
+
+* Sixth version revised D. Fixed an issue with word usage (a terminology) in the documentation for 'genControl' function.
diff --git a/UkrainianLControl.hs b/UkrainianLControl.hs
--- a/UkrainianLControl.hs
+++ b/UkrainianLControl.hs
@@ -49,9 +49,9 @@
 -- \'o\' -> Ogg Vorbis format with compression from -1 (best) to 10 (least) specified by the characters after the first two characters. The default value is "-1". This format is optional 
 -- so, please, check whether it is supported by your SoX binaries. If no, install the SoX with support for the format. For more information, please, refer to the @sox@ documentation.
 -- 
--- \'w\' -> WAV format with two options for bitrate - 11025 if the third character is less than '5' and greater than '0' and otherwise 22050 (the default one also for no command line arguments). 
+-- \'w\' -> WAV format with two options for rate - 11025 Hz if the third character is less than '5' and greater than '0' and otherwise 22050 Hz (the default one also for no command line arguments). 
 -- 
--- If A is a digit, then it is used accordingly to 'nSymbols' function and SoX (if properly installed) quickly converts the .raw file to the default .wav with 22050 Hz bitrate.
+-- If A is a digit, then it is used accordingly to 'nSymbols' function and SoX (if properly installed) quickly converts the .raw file to the default .wav with 22050 Hz rate.
 -- 
 -- To obtain the best compression ratio, please specify something like \"o9-1\" or \"o5-1\" (or similar). For the best lossless compression - \"f98\" or \"f58\" (or similar). 
 -- 
diff --git a/mmsyn6ukr.cabal b/mmsyn6ukr.cabal
--- a/mmsyn6ukr.cabal
+++ b/mmsyn6ukr.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                mmsyn6ukr
-version:             0.6.3.0
+version:             0.6.3.1
 synopsis:            A musical instrument synthesizer or a tool for Ukrainian language listening
 description:         A program can be used as a musical instrument synthesizer or for Ukrainian speech synthesis especially for poets and writers
 homepage:            https://hackage.haskell.org/package/mmsyn6ukr