diff --git a/README.md b/README.md
index dbdaacc..72cc9c9 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,26 @@
-# ece45-project
+# ECE45-project
 
+ Audio synthesizer project created by ECE 45 students, written using the MATLAB language and MATLAB GUI
+ 
+ Will add member names shortly
+ 
+ ## Function Prototypes
+ 
 fuction x = envelope(input, fs, period, attack , decay, sustain, release)
 where attack, decay, sustain release are percentages between 0 to 1 of the period
 where period is the time in seconds
 
 function x = generate_wave(amplitude, frequency, phase, fs, duration, duty)
 
-
 function  output_timedomain = Filter(input_soundin_timedomain, Fs, LOW, MED, HIGH) 
-where LOW, MED, HIGH are user-selected variables of any value
\ No newline at end of file
+where LOW, MED, HIGH are user-selected variables of any value
+ 
+ ## Useful websites
+ 
+ - https://learningsynths.ableton.com
+ - https://learningsynths.ableton.com/en/playground
+ - https://blog.demofox.org/diy-synthesizer/
+ - http://portaudio.com/
+ - https://ccrma.stanford.edu/software/stk/
+ - https://cycling74.com/products/max
+ - http://msp.ucsd.edu/software.html
\ No newline at end of file
diff --git a/src/generate_sine.m b/src/generate_sine.m
index 76c4a09..4add313 100644
--- a/src/generate_sine.m
+++ b/src/generate_sine.m
@@ -1,4 +1,4 @@
-function x = generate_sine(amplitude, frequency, phase, fs, duration)
+function x = generate_sine(amplitude, frequency, phase, fs, duration, duty)
 %GENERATE_SINE:Arthur Lu returns a matrix of sampled sine wave, where the
 %phase shift is in number of periods
     x = zeros(1, fs * duration);