diff --git a/src/.DS_Store b/src/.DS_Store
index 5008ddf..14624d2 100644
Binary files a/src/.DS_Store and b/src/.DS_Store differ
diff --git a/src/freqResponse.m b/src/freqResponse.m
new file mode 100644
index 0000000..33d24a8
--- /dev/null
+++ b/src/freqResponse.m
@@ -0,0 +1,17 @@
+function output = freqResponse(input, H, fs)
+
+    %midterm 1 function:
+    %H = @(w) (100*j*w*(1+j*w))/(10^(-7)*(1000+j*w)^2*(10+j*w))
+    
+    len = length(input);
+    f = fs*(-len/2:len/2-1)/len;
+    
+    Input = fftshift(fft(input));
+    
+    
+    Output = zeros(1, length(Input));
+    for i=1:length(f)
+        Output(i) = Input(i) * H(f(i));
+    end
+    output = real(ifft(Output));
+end
\ No newline at end of file
diff --git a/src/reverse.m b/src/reverse.m
new file mode 100644
index 0000000..c14c8ae
--- /dev/null
+++ b/src/reverse.m
@@ -0,0 +1,3 @@
+function output = reverse(input)
+    output = flip(input);
+end
\ No newline at end of file