HW1.1 Mark Frankosky ECE301Fall2008mboutin - Rhea

Sound Files

Still working on recording the media when i play them...

MATLAB Code Hail Purdue

% Mark Frankosky (mfrankos@purdue.edu)
% ECE301 HW1.1
% Hail Purdue

% Set up Sample Rate
SampleRate = 1/20000;
timeSig = 172;

% Times
Q = 60/timeSig;
E = 60/timeSig/2;
DQ = Q+E;
H = 2*Q;
DH = H+Q;

% Set up note frequencies...
C4  = 2*130.81;
C4S = 2*138.59;
D4  = 2*146.83;
D4S = 2*155.56;
E4  = 2*164.81;
F4  = 2*174.61;
F4S = 2*185;
G4  = 2*196;
G4S = 2*207.65;
A4  = 2*220;
A4S = 2*233.08;
B4  = 2*246.94;

% Set up Notes
Notes = [A4 B4 C4S D4 E4 F4S F4S G4 G4 G4 D4 E4 F4 F4S];

% Set up Times
NoteLength = [H Q Q DQ E Q Q Q E E Q E E DH];

% Play normal speed
for nn=1:length(NoteLength)
  
  TimeVector    = 0:SampleRate:NoteLength(nn);
  SoundVector   = sin(2*pi*Notes(nn)*TimeVector);

  soundsc(SoundVector, 1/SampleRate);
end

pause(2)

% Play second time twice as fast
for nn=1:length(NoteLength)
  
  TimeVector    = 0:SampleRate:.5*NoteLength(nn);
  SoundVector   = sin(2*pi*Notes(nn)*TimeVector);

  soundsc(SoundVector, 1/SampleRate);
end

pause(2)

% play third time with twice the frequency
% same as applying the transform x(2t)
for nn=1:length(NoteLength)
  
  TimeVector    = 0:SampleRate:NoteLength(nn);
  SoundVector   = sin(2*2*pi*Notes(nn)*TimeVector);

  soundsc(SoundVector, 1/SampleRate);
end