Set up a Matlab vector to play the .Parameter Values: notes in the C-major scale

Question

Set up a Matlab vector to play the .Parameter Values: notes in the C-major scale o Play using soundsc o Spectrogram using. Set up a Matlab vector to play several different chords o Sample frequency: 8 kHz o Note duration for scale: 0.5 sec o Chord duration: 2 sec o Use the vales given in section 3.6 o Text p. 82 describes computing o Try different combinations and fine a good sounding 2-note chord o Play using soundsc o Spectrogram using. frequency from note index spectrogram function, Signal Analyzer App, or Spectrum Analyzer block ·Q2: Explain what you think makes a chord sound pleasant

Explanation / Answer

Code:

function y =nsound(note,duration)

note='C3'; % For example, you can use any.
duration=2;
% American standard for finding frequency for notes.
switch note
case 'C3'
f=130.81;
case 'C#3'
f=138.59;
case 'D3'
f=146.83;
case 'D#3'
f=155.56;
case 'E3'
f=164.81;
case 'F3'
f=174.61;
case 'F#3'
f=185.00;
case 'G3'
f=196.00;
case 'G#3'
f=207.65;
case 'A3'
f=220.00;
case 'A#3'
f=233.08;
case 'B3'
f=246.94;
case 'C4'
f=261.63;
case 'C#4'
f=277.18;
case 'D4'
f=293.66;
case 'D#4'
f=311.13;
case 'E4'
f=329.63;
case 'F4'
f=349.23;
case 'F#4'
f=369.99;
case 'G4'
f=392.00;
case 'G#4'
f=415.30;
case 'A4'
f=440.00;
case 'A#4'
f=466.16;
case 'B4'
f=493.88;
case 'C5'
f=523.25;
case 'C#5'
f=554.37;
case 'D5'
f=587.33;
case 'D#5'
f=622.25;
case 'E5'
f=659.26;
case 'F5'
f=698.46;
case 'F#5'
f=739.99;
case 'G5'
f=783.99;
case 'G#5'
f=830.61;
case 'A5'
f=880.00;
case 'A#5'
f=932.33;
case 'B5'
f=987.77;
case 'p'
f=000.00;
otherwise
error('Not a recognized note')
end

s=8000; % Sampling frequencyie 8kHz.
t=0:1/s:duration;
y=sin(2*pi*f*t);
sound(y,s) % MATLAB's SOUND function to produce the note on speakers

Output:

>> cnote

ans =

Columns 1 through 12

0 0.1026 0.2040 0.3034 0.3995 0.4914 0.5781 0.6588 0.7324 0.7984 0.8559 0.9045

Columns 13 through 24

0.9434 0.9725 0.9912 0.9996 0.9973 0.9846 0.9615 0.9282 0.8852 0.8328 0.7716 0.7023

Columns 25 through 36

0.6256 0.5423 0.4532 0.3594 0.2618 0.1615 0.0594 -0.0433 -0.1455 -0.2462 -0.3443 -0.4388

Columns 37 through 48

-0.5286 -0.6129 -0.6907 -0.7612 -0.8237 -0.8775 -0.9221 -0.9569 -0.9816 -0.9960 -0.9999 -0.9932

Columns 49 through 60

-0.9761 -0.9487 -0.9112 -0.8642 -0.8080 -0.7434 -0.6708 -0.5912 -0.5054 -0.4143 -0.3187 -0.2198

Columns 61 through 72

-0.1186 -0.0162 0.0865 0.1882 0.2879 0.3846 0.4772 0.5649 0.6465 0.7213 0.7886 0.8475

Columns 73 through 84

0.8974 0.9380 0.9686 0.9890 0.9989 0.9984 0.9873 0.9658 0.9341 0.8926 0.8416 0.7818

Columns 85 through 96

0.7137 0.6381 0.5558 0.4676 0.3745 0.2774 0.1774 0.0756 -0.0271 -0.1295 -0.2305 -0.3291

Columns 97 through 108

-0.4242 -0.5148 -0.6000 -0.6789 -0.7506 -0.8144 -0.8696 -0.9157 -0.9521 -0.9784 -0.9945 -1.0000

Columns 109 through 120

-0.9950 -0.9795 -0.9537 -0.9178 -0.8722 -0.8175 -0.7541 -0.6827 -0.6042 -0.5193 -0.4289 -0.3340

Columns 121 through 132

-0.2356 -0.1347 -0.0323 0.0703 0.1723 0.2724 0.3696 0.4630 0.5514 0.6341 0.7100 0.7785

Columns 133 through 144

0.8388 0.8902 0.9322 0.9644 0.9864 0.9981 0.9992 0.9897 0.9699 0.9398 0.8997 0.8502

Columns 145 through 156

0.7918 0.7250 0.6505 0.5692 0.4818 0.3894 0.2929 0.1933 0.0917 -0.0109 -0.1134 -0.2147

Columns 157 through 168

-0.3138 -0.4095 -0.5009 -0.5870 -0.6669 -0.7398 -0.8049 -0.8616 -0.9091 -0.9470 -0.9750 -0.9926

Columns 169 through 180

-0.9998 -0.9965 -0.9826 -0.9584 -0.9241 -0.8800 -0.8267 -0.7646 -0.6945 -0.6170 -0.5331 -0.4435

Columns 181 through 192

-0.3492 -0.2513 -0.1507 -0.0485 0.0542 0.1563 0.2568 0.3546 0.4486 0.5379 0.6215 0.6986

Columns 193 through 204

0.7683 0.8299 0.8827 0.9263 0.9600 0.9837 0.9969 0.9997 0.9919 0.9737 0.9452 0.9067

Columns 205 through 216

0.8586 0.8015 0.7360 0.6627 0.5824 0.4959 0.4043 0.3083 0.2092 0.1078 0.0052 -0.0974

Columns 217 through 228

-0.1989 -0.2984 -0.3947 -0.4868 -0.5738 -0.6548 -0.7289 -0.7952 -0.8532 -0.9022 -0.9417 -0.9712

Columns 229 through 240

-0.9905 -0.9994 -0.9977 -0.9855 -0.9629 -0.9301 -0.8876 -0.8357 -0.7749 -0.7060 -0.6297 -0.5467

Columns 241 through 252

-0.4579 -0.3643 -0.2669 -0.1666 -0.0646 0.0380 0.1403 0.2411 0.3394 0.4341 0.5242 0.6087

Columns 253 through 264

0.6869 0.7578 0.8207 0.8750 0.9200 0.9554 0.9806 0.9955 1.0000 0.9938 0.9772 0.9503

Columns 265 through 276

0.9134 0.8668 0.8111 0.7468 0.6747 0.5955 0.5099 0.4190 0.3237 0.2249 0.1238 0.0214

Columns 277 through 288

-0.0812 -0.1830 -0.2829 -0.3798 -0.4726 -0.5605 -0.6425 -0.7177 -0.7853 -0.8447 -0.8951 -0.9361

Columns 289 through 300

-0.9673 -0.9882 -0.9987 -0.9987 -0.9881 -0.9671 -0.9360 -0.8949 -0.8444 -0.7850 -0.7174 -0.6421

Columns 301 through 312

-0.5601 -0.4722 -0.3793 -0.2824 -0.1826 -0.0808 0.0219 0.1243 0.2254 0.3241 0.4194 0.5103

Columns 313 through 324

0.5958 0.6751 0.7472 0.8114 0.8671 0.9136 0.9505 0.9773 0.9939 1.0000 0.9955 0.9805

Columns 325 through 336

0.9552 0.9198 0.8748 0.8205 0.7575 0.6866 0.6084 0.5238 0.4336 0.3389 0.2407 0.1399

Columns 337 through 348

0.0376 -0.0651 -0.1671 -0.2673 -0.3648 -0.4583 -0.5471 -0.6300 -0.7064 -0.7752 -0.8359 -0.8878

Columns 349 through 360

-0.9303 -0.9630 -0.9856 -0.9977 -0.9994 -0.9905 -0.9711 -0.9415 -0.9020 -0.8530 -0.7950 -0.7285

Columns 361 through 372

-0.6545 -0.5735 -0.4864 -0.3942 -0.2979 -0.1984 -0.0969 0.0057 0.1082 0.2096 0.3088 0.4047

Columns 373 through 384

0.4964 0.5828 0.6630 0.7363 0.8018 0.8589 0.9069 0.9453 0.9738 0.9920 0.9997 0.9969

Columns 385 through 396

0.9836 0.9599 0.9261 0.8825 0.8296 0.7680 0.6982 0.6211 0.5375 0.4482 0.3541 0.2563

Columns 397 through 408

0.1558 0.0537 -0.0490 -0.1511 -0.2517 -0.3497 -0.4439 -0.5335 -0.6174 -0.6948 -0.7649 -0.8269

Columns 409 through 420

-0.8802 -0.9243 -0.9585 -0.9827 -0.9965 -0.9998 -0.9926 -0.9749 -0.9469 -0.9089 -0.8613 -0.8047

Columns 421 through 432

-0.7395 -0.6666 -0.5866 -0.5005 -0.4091 -0.3133 -0.2143 -0.1130 -0.0105 0.0921 0.1938 0.2934

Columns 433 through 444

0.3899 0.4823 0.5696 0.6509 0.7253 0.7921 0.8505 0.9000 0.9399 0.9700 0.9898 0.9992

Columns 445 through 456

0.9980 0.9864 0.9643 0.9321 0.8900 0.8385 0.7782 0.7097 0.6337 0.5510 0.4625 0.3692

Columns 457 through 468

0.2719 0.1718 0.0699 -0.0328 -0.1351 -0.2360 -0.3345 -0.4294 -0.5197 -0.6046 -0.6831 -0.7544

Columns 469 through 480

-0.8177 -0.8725 -0.9180 -0.9538 -0.9796 -0.9950 -1.0000 -0.9944 -0.9783 -0.9519 -0.9155 -0.8694

Columns 481 through 492

-0.8142 -0.7503 -0.6786 -0.5996 -0.5144 -0.4238 -0.3286 -0.2300 -0.1290 -0.0266 0.0760 0.1779

Columns 493 through 504

0.2779 0.3749 0.4680 0.5562 0.6385 0.7141 0.7821 0.8419 0.8928 0.9343 0.9659 0.9874

Columns 505 through 516

0.9984 0.9989 0.9889 0.9685 0.9378 0.8972 0.8472 0.7883 0.7210 0.6461 0.5645 0.4768

Columns 517 through 528

0.3842 0.2874 0.1877 0.0860 -0.0166 -0.1191 -0.2203 -0.3192 -0.4147 -0.5058 -0.5916 -0.6712

Columns 529 through 540

-0.7437 -0.8083 -0.8644 -0.9114 -0.9488 -0.9762 -0.9933 -0.9999 -0.9960 -0.9815 -0.9568 -0.9219

Columns 541 through 552

-0.8773 -0.8234 -0.7609 -0.6903 -0.6125 -0.5282 -0.4383 -0.3439 -0.2457 -0.1450 -0.0428 0.0599

Columns 553 through 564

.... and so on

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