diff --git a/.DS_Store b/.DS_Store
index dd306f7..bc2a648 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/App/.DS_Store b/App/.DS_Store
deleted file mode 100644
index 5008ddf..0000000
Binary files a/App/.DS_Store and /dev/null differ
diff --git a/App/app.mlapp b/App/app.mlapp
deleted file mode 100644
index 6012b39..0000000
Binary files a/App/app.mlapp and /dev/null differ
diff --git a/app.mlapp b/app.mlapp
new file mode 100644
index 0000000..c62d37e
Binary files /dev/null and b/app.mlapp differ
diff --git a/src/Helper/MIDIDarell.m b/src/Helper/MIDIDarell.m
index 19491c4..2253b73 100644
--- a/src/Helper/MIDIDarell.m
+++ b/src/Helper/MIDIDarell.m
@@ -1,6 +1,6 @@
 function output = MIDIDarell(dur,Fs)
 %Darell Chua Yun Da
-%   Detailed explanation goes here
+%   Use Qwerty Keys for each sound frequency.
 
     freq = [330 350 370 392 415 440 466 494 523 554];
     charls = ["q" "w" "e" "r" "t" "y" "u" "i" "o" "p"];