| Line 6: | Line 6: | ||
clear; | clear; | ||
clc; | clc; | ||
| + | |||
% PART A | % PART A | ||
| + | |||
delta = 0.0005; | delta = 0.0005; | ||
H=0:delta: 1; %half | H=0:delta: 1; %half | ||
Revision as of 17:49, 2 September 2008
%Hetong Li %09/01/08 %ECE301 hw1.1 clear; clc; % PART A delta = 0.0005; H=0:delta: 1; %half Q=0:delta:0.5; %quacter DQ_time=0:delta:0.75; %dotted quacter EN=0:delta:0.25; %one eighth %Assign signals for each used note AH = sin(2*pi*220*H); BQ= sin(2*pi*493.88/2*Q); DBQ=sin(2*pi*277.18*Q); DDQ = sin(2*pi*293.66*DQ_time); DQ = sin(2*pi*293.66*Q); EEN =sin(2*pi*329.63*EN); GBQ=sin(2*pi*369.99*Q); GQ=sin(2*pi*392*Q); GEN=sin(2*pi*392*EN); FEN= sin(2*pi*349.23*EN); GBEN=sin(2*pi*369.99*EN); notes= [AH BQ DBQ DDQ EEN GBQ GBQ GQ GEN GEN DQ EEN FEN GBEN]; sound (notes,1/delta); wavwrite(notes,1/delta,32,'music-a.wav'); % PART B %half the duration %we will hear the some plays at twice speed as before delta = 0.0005; H=0:delta: 0.5; Q=0:delta:0.25; DQ_time=0:delta:0.375; EN=0:delta:0.125; AH = sin(2*pi*220*H); BQ= sin(2*pi*493.88/2*Q); DBQ=sin(2*pi*277.18*Q); DDQ = sin(2*pi*293.66*DQ_time); DQ = sin(2*pi*293.66*Q); EEN =sin(2*pi*329.63*EN); GBQ=sin(2*pi*369.99*Q); GQ=sin(2*pi*392*Q); GEN=sin(2*pi*392*EN); FEN= sin(2*pi*349.23*EN); GBEN=sin(2*pi*369.99*EN); notes= [AH BQ DBQ DDQ EEN GBQ GBQ GQ GEN GEN DQ EEN FEN GBEN]; sound (notes,1/delta); wavwrite(notes,1/delta,32,'music-b.wav'); % PART C %Change the duration back to part a delta = 0.0005; H=0:delta: 1; Q=0:delta:0.5; DQ_time=0:delta:0.75; EN=0:delta:0.25; %as we replace t with 2t,so double the time in signal function %which also means double the frequency of each signal %we will hear a song with higher pitch AH = sin(2*pi*2*220*H); BQ= sin(2*pi*2*493.88/2*Q); DBQ=sin(2*pi*2*277.18*Q); DDQ = sin(2*pi*2*293.66*DQ_time); DQ = sin(2*pi*2*293.66*Q); EEN =sin(2*pi*2*329.63*EN); GBQ=sin(2*pi*2*369.99*Q); GQ=sin(2*pi*2*392*Q); GEN=sin(2*pi*2*392*EN); FEN= sin(2*pi*2*349.23*EN); GBEN=sin(2*pi*2*369.99*EN); notes= [AH BQ DBQ DDQ EEN GBQ GBQ GQ GEN GEN DQ EEN FEN GBEN]; sound (notes,1/delta); wavwrite(notes,1/delta,32,'music-c.wav');
