n = 2^11;

delta = 2*pi/n;
t = 0:delta:2*pi-delta;

c = sin(2*pi*65.41*t);
d = sin(2*pi*73.42*t);
e = sin(2*pi*82.41*t);
f = sin(2*pi*87.3*t);
g = sin(2*pi*98*t);
a = sin(2*pi*110*t);
b = sin(2*pi*123.47*t);

cc = sin(2*pi*65.41/2*t);
gg = sin(2*pi*98/2*t);
ggnoise = gg.*(1.5*rand(1,n));

ce3k = [d e c cc gg];
ce3knoise = ce3k.*(1.5*rand(1,n*5));