diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -306,3 +306,7 @@
 
 * Thirty-fifth version. Added generalized versions for splitting functions (library). Some code improvements (reducing duplication). Some documentation 
 improvements. Some descriptive changes in the dobutokO2.cabal file.
+
+## 0.35.1.0 -- 2020-04-22
+
+* Thirty-fifth version revised A. Fixed issues with some wrongly defined parameters for the new MN functions. Some documentation improvements.
diff --git a/DobutokO/Sound.hs b/DobutokO/Sound.hs
--- a/DobutokO/Sound.hs
+++ b/DobutokO/Sound.hs
@@ -5,8 +5,9 @@
 -- Stability   :  Experimental
 -- Maintainer  :  olexandr543@yahoo.com
 --
--- A program and a library to create experimental music
--- from a mono audio and a Ukrainian text.
+-- Helps to create experimental music from a file (or its part) and a Ukrainian text. 
+-- It can also generate a timbre for the notes. Uses SoX inside.
+
 {-# LANGUAGE BangPatterns, LambdaCase #-}
 {-# OPTIONS_GHC -threaded #-}
 
diff --git a/DobutokO/Sound/Executable.hs b/DobutokO/Sound/Executable.hs
--- a/DobutokO/Sound/Executable.hs
+++ b/DobutokO/Sound/Executable.hs
@@ -5,8 +5,8 @@
 -- Stability   :  Experimental
 -- Maintainer  :  olexandr543@yahoo.com
 --
--- A program and a library to create experimental music
--- from a mono audio and a Ukrainian text.
+-- Helps to create experimental music from a file (or its part) and a Ukrainian text. 
+-- It can also generate a timbre for the notes. Uses SoX inside.
 
 {-# LANGUAGE LambdaCase #-}
 {-# OPTIONS_GHC -threaded #-}
@@ -649,7 +649,7 @@
                               ----------------------                        
   --                                    f
 testSoundGen2GMN m n1 file f y zs = do
-  vecA0 <- fmap (V.map (`quotRem` 108)) ((if m == 0 && n1 == 0 then readFileDoubles else readFileDoublesMN m n1) file) -- >>= print
+  vecA0 <- fmap (V.map (`quotRem` 108)) ((if m == (-1) && n1 == (-1) then readFileDoubles else readFileDoublesMN m n1) file) -- >>= print
   let n = V.length vecA0
       freq0 j = V.unsafeIndex notes (snd . V.unsafeIndex vecA0 $ j `rem` n)
       f0 t = V.fromList [(0.05763181818181818 * t, 0.3598),(1.112159090909091 * t, 0.4588962),(2 * t, 0.6853),(3 * t, 0.268),(4 * t, 0.6823),(5 * t, 0.53)]
@@ -682,7 +682,7 @@
 soundGen3GMN :: Int64 -> Int64 -> FilePath -> (Double -> OvertonesO) -> Double -> String -> ((Double,Double) -> Double -> (Double -> OvertonesO) -> OvertonesO) 
   -> ((Double,Double) -> Double -> (Double -> OvertonesO) -> OvertonesO) -> (Double -> OvertonesO) -> IO ()
 soundGen3GMN m n1 file f y zs gAdd gRem f0 = do
-  vecA0 <- fmap (V.map (`quotRem` 108)) ((if m == 0 && n1 == 0 then readFileDoubles else readFileDoublesMN m n1) file) -- >>= print
+  vecA0 <- fmap (V.map (`quotRem` 108)) ((if m == (-1) && n1 == (-1) then readFileDoubles else readFileDoublesMN m n1) file) -- >>= print
   let n = V.length vecA0
       freq0 j = V.unsafeIndex notes (snd . V.unsafeIndex vecA0 $ j `rem` n)
       fA1 j = fAddFElem (freq0 (j + 1),0.5) f0 gAdd
@@ -721,7 +721,7 @@
   -> (OvertonesO -> Double -> (Double -> OvertonesO) -> OvertonesO) -> (Int -> OvertonesO) -> (OvertonesO -> OvertonesO) -> 
     (Double -> OvertonesO) -> IO ()
 soundGen3G_OMN m1 n1 m ku freq1 file f y zs gAdds gRems freq0 proj f0 = do
-  vecA0 <- fmap (V.map (`quotRem` 108)) ((if m1 == 0 && n1 == 0 then readFileDoubles else readFileDoublesMN m1 n1) file) -- >>= print
+  vecA0 <- fmap (V.map (`quotRem` 108)) ((if m1 == (-1) && n1 == (-1) then readFileDoubles else readFileDoublesMN m1 n1) file) -- >>= print
   let n = V.length vecA0
       fA1 j = fAddFElems (proj . freq0 $ j) f0 gAdds
       fR1 j = fRemoveFElems (proj . freq0 $ j) f0 gRems
@@ -778,7 +778,7 @@
     (OvertonesO -> Double -> (Double -> OvertonesO) -> OvertonesO) -> (OvertonesO -> Double -> (Double -> OvertonesO) -> OvertonesO) -> 
       (Int -> OvertonesO) -> (OvertonesO -> OvertonesO) -> (Double -> OvertonesO) -> IO ()
 soundGen3G_O2MN m1 n1 conversionFII m ku freq1 file f y zs gAdds gRems freq0 proj f0 = do
-  vecA0 <- fmap (V.map (`quotRem` 108)) ((if m1 == 0 && n1 == 0 then readFileDoubles else readFileDoublesMN m1 n1) file) -- >>= print
+  vecA0 <- fmap (V.map (`quotRem` 108)) ((if m1 == (-1) && n1 == (-1) then readFileDoubles else readFileDoublesMN m1 n1) file) -- >>= print
   let n = V.length vecA0
       fA1 j = fAddFElems (proj . freq0 $ j) f0 gAdds
       fR1 j = fRemoveFElems (proj . freq0 $ j) f0 gRems
@@ -815,7 +815,7 @@
       (OvertonesO -> Double -> (Double -> OvertonesO) -> OvertonesO) -> (OvertonesO -> Double -> (Double -> OvertonesO) -> OvertonesO) -> 
         (Int -> OvertonesO) -> (Double -> OvertonesO) -> IO ()
 soundGen3G_O2GMN m1 n1 conversionFII vf vfA vfR m ku freq1 file f y zs gAdds gRems freq0 f0 = do
-  vecA0 <- fmap (V.map (`quotRem` 108)) ((if m1 == 0 && n1 == 0 then readFileDoubles else readFileDoublesMN m1 n1) file) -- >>= print
+  vecA0 <- fmap (V.map (`quotRem` 108)) ((if m1 == (-1) && n1 == (-1) then readFileDoubles else readFileDoublesMN m1 n1) file) -- >>= print
   let n = V.length vecA0
       vecB = conversionFII (vf,vfA,vfR) vecA0
       (t, ws) = splitAt 1 . syllableStr n $ zs
diff --git a/DobutokO/Sound/Functional.hs b/DobutokO/Sound/Functional.hs
--- a/DobutokO/Sound/Functional.hs
+++ b/DobutokO/Sound/Functional.hs
@@ -5,8 +5,8 @@
 -- Stability   :  Experimental
 -- Maintainer  :  olexandr543@yahoo.com
 --
--- A program and a library to create experimental music
--- from a mono audio and a Ukrainian text.
+-- Helps to create experimental music from a file (or its part) and a Ukrainian text. 
+-- It can also generate a timbre for the notes. Uses SoX inside.
 
 {-# LANGUAGE BangPatterns #-}
 {-# OPTIONS_GHC -threaded #-}
diff --git a/DobutokO/Sound/IntermediateF.hs b/DobutokO/Sound/IntermediateF.hs
--- a/DobutokO/Sound/IntermediateF.hs
+++ b/DobutokO/Sound/IntermediateF.hs
@@ -5,9 +5,9 @@
 -- Stability   :  Experimental
 -- Maintainer  :  olexandr543@yahoo.com
 --
--- A program and a library to create experimental music
--- from a mono audio and a Ukrainian text. Can work with both WAV and FLAC files if
--- your SoX installation supports FLAC.
+-- Helps to create experimental music from a file (or its part) and a Ukrainian text. 
+-- It can also generate a timbre for the notes. Uses SoX inside.
+
 
 {-# OPTIONS_GHC -threaded #-}
 
diff --git a/DobutokO/Sound/Keyboard.hs b/DobutokO/Sound/Keyboard.hs
--- a/DobutokO/Sound/Keyboard.hs
+++ b/DobutokO/Sound/Keyboard.hs
@@ -5,9 +5,8 @@
 -- Stability   :  Experimental
 -- Maintainer  :  olexandr543@yahoo.com
 --
--- A program and a library to create experimental music
--- from a mono audio and a Ukrainian text. Can work with both WAV and FLAC files if
--- your SoX installation supports FLAC.
+-- Helps to create experimental music from a file (or its part) and a Ukrainian text. 
+-- It can also generate a timbre for the notes. Uses SoX inside.
 
 {-# OPTIONS_GHC -threaded #-}
 
@@ -115,12 +114,12 @@
 
 -- | Like 'readFileDoublesGen', but returns only first @n@ elements of the 'V.Vector' specified with the first 'Int64' argument.
 readFileDoublesGenN :: Int64 -> String -> FilePath -> IO (V.Vector Int)
-readFileDoublesGenN n ys = fmap (V.unsafeSlice 0 (fromIntegral n - 1) . takeDoubles . convH ys (BL.filter isAsciiLower)) . BL.readFile
+readFileDoublesGenN n ys = fmap (V.unsafeSlice 0 (fromIntegral n) . takeDoubles . convH ys (BL.filter isAsciiLower)) . BL.readFile
 
 -- | Like 'readFileDoublesGen', but returns only first @n@ symbols specified with the second 'Int64' argument dropping before this the first @m@ symbols specified 
 -- with the first 'Int64' argument.
 readFileDoublesGenMN :: Int64 -> Int64 -> String -> FilePath -> IO (V.Vector Int)
-readFileDoublesGenMN m n ys = fmap (V.unsafeSlice (fromIntegral m - 1) (fromIntegral n - 1) . takeDoubles . convH ys (BL.filter isAsciiLower)) . BL.readFile
+readFileDoublesGenMN m n ys = fmap (V.unsafeSlice (fromIntegral m) (fromIntegral n) . takeDoubles . convH ys (BL.filter isAsciiLower)) . BL.readFile
 
 -- | Usual way the function 'readFileDoublesGen' is used. The text in a file being read is treated as a properly typed (entered) one. So there is no 
 -- keyboard layout conversion at all.
diff --git a/DobutokO/Sound/ParseList.hs b/DobutokO/Sound/ParseList.hs
--- a/DobutokO/Sound/ParseList.hs
+++ b/DobutokO/Sound/ParseList.hs
@@ -5,8 +5,8 @@
 -- Stability   :  Experimental
 -- Maintainer  :  olexandr543@yahoo.com
 --
--- A program and a library to create experimental music
--- from a mono audio and a Ukrainian text.
+-- Helps to create experimental music from a file (or its part) and a Ukrainian text. 
+-- It can also generate a timbre for the notes. Uses SoX inside.
 
 {-# OPTIONS_GHC -threaded #-}
 
diff --git a/README.markdown b/README.markdown
--- a/README.markdown
+++ b/README.markdown
@@ -1,6 +1,6 @@
-A program and a library to create experimental music from
-a mono audio and a Ukrainian text. It can also create a timbre
-for the notes.
+Helps to create experimental music from a file (or its part) and a Ukrainian text. 
+It can also generate a timbre for the notes. Uses SoX inside.
+
 
                 ***** Usage *****
                 -----------------
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:             0.35.0.0
+version:             0.35.1.0
 synopsis:            Helps to create experimental music from a file (or its part) and a Ukrainian text.
 description:         It can also generate a timbre for the notes. Uses SoX inside.
 homepage:            https://hackage.haskell.org/package/dobutokO2