diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -59,3 +59,7 @@
 ## 0.7.1.1 -- 2020-03-10
 
 * Seventh version revised B. Fixed issue with improper README.markdown file information.
+
+## 0.7.2.0 -- 2020-03-11
+
+* Seventh version revised C. Improved README.markdown file. Added exporting for all the basic functions in the DobutokO.Sound module.
diff --git a/DobutokO/Sound.hs b/DobutokO/Sound.hs
--- a/DobutokO/Sound.hs
+++ b/DobutokO/Sound.hs
@@ -21,9 +21,11 @@
   , oberTones2
   , oberSoXSynth2
   , oberSoXSynthN2
+  , oberSoXSynthN3
   -- *** Uses a file for information
   , oberSoXSynthNGen
   , oberSoXSynthNGen2
+  , oberSoXSynthNGen3
   -- ** For the unique for the String structure timbre
   , uniqOberTonesV
   , uniqOberSoXSynth
@@ -77,7 +79,8 @@
 -- notes V.! 57 = 440.0   -- A4 in Hz
 notes = V.generate 108 (\t ->  fromIntegral 440 * 2 ** (fromIntegral (t - 57) / fromIntegral 12))
 
--- | Function returns either the nearest two musical notes if frequency is higher than one for C0 and lower than one for B8 or the nearest note duplicated in a tuple.
+-- | Function returns either the nearest two musical notes if frequency is higher than one for C0 and lower than one for B8
+-- or the nearest note duplicated in a tuple.
 neighbourNotes :: Double -> V.Vector Double -> (Double, Double)
 neighbourNotes x v
   | compare x (V.unsafeIndex v 0) /= GT = (V.unsafeIndex v 0, V.unsafeIndex v 0)
@@ -676,8 +679,8 @@
     ("й", 7), ("к", 10), ("л", 7), ("м", 7), ("н", 7), ("о", 12), ("п", 10), ("р", 7), ("с", 10), ("т", 2), ("у", 12), ("ф", 2), ("х", 2),
       ("ц", 11), ("ч", 11), ("ш", 1), ("і", 12), ("ґ", 9)]) 
 
--- | Function to get from the number of semi-tones and a note a 'Maybe' note for the second note if any. If there is no need to obtain such a note,
--- then the result is 'Nothing'.
+-- | Function to get from the number of semi-tones and a note a 'Maybe' note for the second lower note in the interval if any. If there is
+-- no need to obtain such a note, then the result is 'Nothing'.
 dNote :: Int -> Double -> Maybe Double
 dNote n note
   | n == 0 || compare note (V.unsafeIndex notes 0) == LT || compare note (V.unsafeIndex notes 107) == GT = Nothing
@@ -933,6 +936,8 @@
                recAndProcess file 8)
   | x == 9 = onException (do
      putStrLn "Please, input the Ukrainian text that will be used to define intervals to be used to produce the lower note for the given main one: "
+     putStrLn The default one is \"й\". "
+     putStrLn "To use the default value, you can simply press Enter."
      vs <- getLine
      if null vs then return "й"
      else return vs) (do
diff --git a/README.markdown b/README.markdown
--- a/README.markdown
+++ b/README.markdown
@@ -20,21 +20,40 @@
   the full absolute path to the sound .wav file (or other one format
   that is supported by your SoX installation) to obtain sound information from.
 
-If the first command line argument equals to "1", or "3", or "5", then the executable
-uses the oberTones functions, so for the given parameters the obertones
-are the same for every call. The "3" adittionally gives an opportunity
-to specify the signs for the harmonics coefficients for obertones by additional
-String. And the "5" additionally to that one functionality provided by "3" gives
-an opportunity to specify in how many times the amplitude for the second lower note
-(if any) is greater, than the amplitude for the main note and specify the intervals
-to be used for every note. Otherwise, the executable uses uniqOberTones functions, which
-can have different obertones because of the provided the second, additional,
-text. The third one is used to generate the obertones. In such a case, another
-text gives the other obertones. If you specify something else, than "1", or "2", or "3",
-or "5", then the program uses uniqOberTones functions and (similarly to "3" option)
-it uses additional String to define signs for the harmonics coefficients for obertones.
-If you specify the "6" option, then the program behaves like for the "5" option,
-but generates obertones using additional String.
+If the first command line argument equals to one of the numbers below, then
+the program behaves as follows:
+
+  "1", or "3", or "5" ->  then the executable uses the oberTones functions,
+    so for the given parameters the obertones are the same for every call.
+
+  "2", or "4", or "6" -> then the program uses uniqOberTones functions.
+
+  "3", or "4", or "5", or "6" -> the program uses additional String
+    to define signs for the harmonics coefficients for obertones.
+      
+  In more detail:
+
+  "1" -> basic functionality without the possibility to define individual obertones.
+  
+  "2" -> basic functionality with the possibility to define individual obertones.
+     In such a case, another text gives the other obertones.
+
+  "3" -> adittionally to basic functionality gives an opportunity 
+     to specify the signs for the harmonics coefficients for obertones
+       by additional String.
+
+  "4" -> similarly to "2" gives an opportunity to specify the signs
+     for the harmonics coefficients for obertones by additional String.
+
+  "5" -> additionally to that one functionality provided by "3" gives
+     an opportunity to specify in how many times the amplitude for
+       the second lower note (if any) is greater, than the amplitude
+         for the main note and specify the intervals to be used
+           for every note.
+
+   _  -> the program behaves like for the "5" option, but generates
+     obertones using additional String and allows maximum control over
+        the parameters.
 
 After the program executing (it takes some time) there is a file "end.wav" in the directory.
 This is the resulting melody generated.
diff --git a/dobutokO2.cabal b/dobutokO2.cabal
--- a/dobutokO2.cabal
+++ b/dobutokO2.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                dobutokO2
-version:             0.7.1.1
+version:             0.7.2.0
 synopsis:            A program and a library to create experimental music from a mono audio and a Ukrainian text
 description:         It can also create a timbre for the notes
 homepage:            https://hackage.haskell.org/package/dobutokO2