(New page: clc; clear all; % PART 1 delta = 0.00005; for var = 1:3 %beats per minute bpm = 112; if var ==2 bpm=112/2; end % beats per second beat = bpm/60; %Eighth note E=0:delta:(be...) |
|||
| (8 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
| − | + | %Zach Bright | |
| − | + | ||
| + | %ECE 301 | ||
| − | + | clc; clear all; | |
| + | <br> % PART 1 | ||
| − | delta = 0.00005; | + | <br> delta = 0.00005; |
| − | for var = 1:3 | + | for var = 1:3 %beats per minute bpm = 112; |
| − | %beats per minute | + | |
| − | bpm = 112; | + | if var ==2 |
| − | |||
bpm=112/2; | bpm=112/2; | ||
| − | |||
| − | + | end | |
| − | + | ||
| + | % beats per second beat = bpm/60; | ||
| − | %Eighth note | + | <br> |
| − | E=0:delta:(beat/8); | + | |
| − | %Half note | + | %Eighth note <br> |
| − | H=0:delta:(beat/2); | + | E=0:delta:(beat/8); |
| − | %Dotted Quarter note | + | |
| − | Dq=0:delta:(beat*(3/8)); | + | %Half note <br> |
| − | %Quarter note | + | H=0:delta:(beat/2); |
| + | |||
| + | %Dotted Quarter note <br> | ||
| + | Dq=0:delta:(beat*(3/8)); | ||
| + | |||
| + | %Quarter note <br> | ||
Q=0:delta:(beat/4); | Q=0:delta:(beat/4); | ||
| + | |||
| + | <br> | ||
| + | %G-note Freq <br> | ||
| + | G=391.995; | ||
| + | %B-flat freq <br> | ||
| + | Bf=466.164; | ||
| − | + | %C freq <br> | |
| − | + | C=523.251; | |
| − | + | ||
| − | + | ||
| − | %C freq | + | |
| − | C=523.251; | + | |
| − | + | ||
| − | + | ||
| − | + | %D-flat freq <br> | |
| − | + | Df=554.365; | |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| + | if var==3 | ||
| − | + | G=2*G; | |
| − | + | Bf=2*Bf; | |
| + | C=2*C; | ||
| + | Df=2*Df; | ||
| + | end <br> | ||
| + | %Establish all notes used in the song %in the form of (Note Letter)_(Length Letter)_note=... <br> | ||
| + | G_Q_note=sin(2*pi*G*Q); <br> | ||
| + | Bf_Q_note=sin(2*pi*Bf*Q); <br> | ||
| + | C_Dq_note=sin(2*pi*C*Dq); <br> | ||
| + | C_H_note=sin(2*pi*C*H); <br> | ||
| + | Df_E_note=sin(2*pi*Df*E); <br> | ||
| + | |||
| + | <br> | ||
| + | %Song at normal speed <br> | ||
| + | smoke=[G_Q_note, Bf_Q_note, C_Dq_note, G_Q_note,Bf_Q_note, Df_E_note, C_H_note, G_Q_note, Bf_Q_note, C_Dq_note, Bf_Q_note, G_Q_note]; | ||
| + | |||
| + | <br> | ||
| + | %create the normal tempo sound file <br> | ||
| + | if var==1 | ||
| − | |||
| − | |||
wavwrite(smoke,1/delta,'smoke_normal.wav'); | wavwrite(smoke,1/delta,'smoke_normal.wav'); | ||
| − | %create the fast tempo sound file | + | |
| − | elseif var==2 | + | %create the fast tempo sound file |
| + | elseif var==2 | ||
| + | |||
wavwrite(smoke,1/delta,'smoke_fast.wav'); | wavwrite(smoke,1/delta,'smoke_fast.wav'); | ||
| − | %create the high pitch sound file | + | |
| − | else | + | %create the high pitch sound file else |
| + | |||
wavwrite(smoke,1/delta,'smoke_high_pitch.wav'); | wavwrite(smoke,1/delta,'smoke_high_pitch.wav'); | ||
| − | |||
| − | end | + | end |
| − | + | ||
| − | + | ||
| − | % a) The forward meesage from the Beatles is "Number 9" | + | end |
| + | |||
| + | % PART 2 | ||
| + | |||
| + | % a) The forward meesage from the Beatles is "Number 9" | ||
% reverse signal | % reverse signal | ||
| − | [Beatles_normal, Fs]=wavread('Beatles.wav'); | + | [Beatles_normal, Fs]=wavread('Beatles.wav'); <br> |
| − | Beatles_reverse=flipud(Beatles_normal) | + | Beatles_reverse=flipud(Beatles_normal)<br>wavwrite(Beatles_reverse,Fs,'backwards_Beatles') <br> |
| − | wavwrite(Beatles_reverse,Fs,'backwards_Beatles') | + | |
| + | % b) In the past I have heard that peolpe think it is saying <br> | ||
| + | % "Turn me on dead man." And because of this previous knowledge <br> | ||
| + | % it sounds like this, but had I not known this, I probably would % not be able to make anything out. | ||
| + | |||
| + | [[Media:smoke_normal_zbright.wav|smoke_normal]]<br> | ||
| + | [[Media:smoke_fast_zbright.wav|smoke_fast]]<br> | ||
| + | [[Media:smoke_high_pitch_zbright.wav|smoke_HighPitch]]<br> | ||
| + | [[Media:backwards_Beatles_zbright.wav|BeatlesReverse]]<br> | ||
| + | |||
| + | <br> | ||
| − | + | <br> | |
| − | + | ||
| − | + | ||
| − | + | ||
Latest revision as of 07:47, 19 January 2011
%Zach Bright
%ECE 301
clc; clear all;
% PART 1
delta = 0.00005;
for var = 1:3 %beats per minute bpm = 112;
if var ==2
bpm=112/2;
end
% beats per second beat = bpm/60;
%Eighth note
E=0:delta:(beat/8);
%Half note
H=0:delta:(beat/2);
%Dotted Quarter note
Dq=0:delta:(beat*(3/8));
%Quarter note
Q=0:delta:(beat/4);
%G-note Freq
G=391.995;
%B-flat freq
Bf=466.164;
%C freq
C=523.251;
%D-flat freq
Df=554.365;
if var==3
G=2*G; Bf=2*Bf; C=2*C; Df=2*Df;
end
%Establish all notes used in the song %in the form of (Note Letter)_(Length Letter)_note=...
G_Q_note=sin(2*pi*G*Q);
Bf_Q_note=sin(2*pi*Bf*Q);
C_Dq_note=sin(2*pi*C*Dq);
C_H_note=sin(2*pi*C*H);
Df_E_note=sin(2*pi*Df*E);
%Song at normal speed
smoke=[G_Q_note, Bf_Q_note, C_Dq_note, G_Q_note,Bf_Q_note, Df_E_note, C_H_note, G_Q_note, Bf_Q_note, C_Dq_note, Bf_Q_note, G_Q_note];
%create the normal tempo sound file
if var==1
wavwrite(smoke,1/delta,'smoke_normal.wav');
%create the fast tempo sound file elseif var==2
wavwrite(smoke,1/delta,'smoke_fast.wav');
%create the high pitch sound file else
wavwrite(smoke,1/delta,'smoke_high_pitch.wav');
end
end
% PART 2
% a) The forward meesage from the Beatles is "Number 9"
% reverse signal
[Beatles_normal, Fs]=wavread('Beatles.wav');
Beatles_reverse=flipud(Beatles_normal)
wavwrite(Beatles_reverse,Fs,'backwards_Beatles')
% b) In the past I have heard that peolpe think it is saying
% "Turn me on dead man." And because of this previous knowledge
% it sounds like this, but had I not known this, I probably would % not be able to make anything out.
smoke_normal
smoke_fast
smoke_HighPitch
BeatlesReverse
