HW1.1 Virgil Hsieh ECE301Fall2008mboutin - Rhea

Sound files

Here is the fight song at normal speed: Fight Song Normal Speed

Here is the fight song at twice the speed: Twice Speed

Here is the fight song at twice the frequency: Twice Frequency

MATLAB Code

% Virgil Hsieh % Homework 1.1: Purdue fight song normal, double speed, and double freq.

% The following two lines clears the screen and all variables clc clear all

% This marks the sampling rate delta = 0.00005;

% Lengths of notes E = 0.125; Q = 0.25; H = 0.5; HQ = H + Q; DQ = Q + E;

% Declares all of the notes needed for 'Hail Purdue' amd their freq. Af = 415; An = 440; Bf = 466; Bn = 494; Cn = 523; Df = 554; Ef = 311; En = 329; Fn = 349; Gf = 370; Gn = 392;

% This is an array of notes for the Purdue fight song Notes = [Ef, Fn, Gn, Af, Bf, Cn, Cn, Df, Df, Df, Af, Bf, Bn, Cn]; Length = [HQ, Q, Q, DQ, E, Q, Q, Q, E, E, Q, E, E, HQ];

count1 = 1;

% Imbedded loop that creates the fight song for walker = 1: (length (Notes))

   count2 = 1;
   t = 0: delta: Length (walker);
   FightSong = sin (2 * 3.14 * t* Notes (walker));
   FSlen = length (FightSong);
   
   while count2 < FSlen
       HailPurdue (count1) = FightSong (count2);
       count1 = count1 + 1;
       count2 = count2 + 1;
   end

end

% Plays the fight song to make sure it works sound (HailPurdue, 1 / delta);

% Makes a wav file for the song wavwrite (HailPurdue, 'HW1_Normal.wav');

count1 = 1;

% Imbedded loop that creates the fight song for walker = 1: (length (Notes))

   count2 = 1;
   t = 0: delta: (Length (walker))/2;
   FightSong2 = sin (2 * 3.14 * t* Notes (walker));
   FSlen = length (FightSong2);
   
   while count2 < FSlen
       HailPurdue2 (count1) = FightSong2 (count2);
       count1 = count1 + 1;
       count2 = count2 + 1;
   end

end

% Plays the fight song to make sure it works sound (HailPurdue2, 1 / delta);

% Makes a wav file for the song wavwrite (HailPurdue2, 'HW1_2Speed.wav');

count1 = 1;

% Imbedded loop that creates the fight song for walker = 1: (length (Notes))

   count2 = 1;
   t = 0: delta: (Length (walker));
   FightSong3 = sin (2 * 2 * 3.14 * t* Notes (walker));
   FSlen = length (FightSong3);
   
   while count2 < FSlen
       HailPurdue3 (count1) = FightSong3 (count2);
       count1 = count1 + 1;
       count2 = count2 + 1;
   end

end

% Plays the fight song to make sure it works sound (HailPurdue2, 1 / delta);

% Makes a wav file for the song wavwrite (HailPurdue3, 'HW1_2Freq.wav');