ASPress - Designing Sound - Practical 22: Car Engines

Practical 22: Car Engines

Pure Data

Engines - simple boat engine effect

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Download toy_boat_engine.pd.

Engines - getting parabolic pulses

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Download pulse_demo.pd.

Engines - a four stroke engine with jitter

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Download jitter_engine.pd.

Engines - warped waveguide engine algorithm

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-0.0639164 -0.0637049 -0.0635824 -0.0634102 -0.0632735 -0.0631791 -0.0629294
-0.0628597 -0.0626411 -0.062546 -0.0624611 -0.0622452 -0.0621872 -0.0620431
-0.0620666 -0.0619632 -0.0618024 -0.0617733 -0.0616874 -0.0616525 -0.0615586
-0.0615454 -0.0614901 -0.0613482 -0.0613272 -0.0613403 -0.0611839 -0.0612061
-0.0611118 -0.0610172 -0.0609858 -0.060865 -0.0608318 -0.0608048 -0.0607135
-0.0606651 -0.0605559 -0.0605317 -0.0604502 -0.0603967 -0.0602895 -0.0602058
-0.0601841 -0.0600626 -0.0599794 -0.0599719 -0.0599136 -0.0597763 -0.0597425
-0.0597392 -0.0596779 -0.0595397 -0.0594789 -0.0594692 -0.0594164 -0.059284
-0.0592691 -0.0592018 -0.0592446 -0.0592385 -0.0591541 -0.0590869 -0.0591304
-0.0591501 -0.0590859 -0.0590853 -0.0590653 -0.0589962 -0.0589844 -0.0590058
-0.0590101 -0.0589551 -0.0588567 -0.0588532 -0.0588139 -0.0586937 -0.0586356
-0.0585991 -0.0584886 -0.0583782 -0.0582567 -0.0582151 -0.0581134 -0.0580609
-0.0580007 -0.0579899 -0.0579521 -0.0578537 -0.0578495 -0.0578215 -0.0577775
-0.0577963 -0.0577097 -0.0576588 -0.0577016 -0.0575873 -0.0576004 -0.0575908
-0.0575964 -0.057593 -0.0576089 -0.0576211 -0.0576257 -0.0575741 -0.057528
-0.0575379 -0.0575152 -0.0574196 -0.0573502 -0.0573055 -0.0573568 -0.0572196
-0.0571798 -0.0570779 -0.0570821 -0.0570474 -0.0570656 -0.0569996 -0.0570516
-0.0570693 -0.0570133 -0.0570186 -0.0570258 -0.0570068 -0.056957 -0.0568851
-0.0569206 -0.0569182 -0.056865 -0.0568554 -0.0568443 -0.056805 -0.056837
-0.0567996 -0.0568681 -0.0567706 -0.0567528 -0.0567055 -0.0566053 -0.0565393
-0.0565109 -0.0564414 -0.0564216 -0.0562999 -0.0562102 -0.0560837 -0.0561325
-0.0559445 -0.0558504 -0.0556797 -0.055636 -0.0554335 -0.0553213 -0.0552097
-0.0550659 -0.0548511 -0.0546598 -0.0544845 -0.0543915 -0.054231 -0.0539845
-0.0538632 -0.0536937 -0.053421 -0.0532317 -0.0530702 -0.0528494 -0.0526696
-0.0524864 -0.0523044 -0.0520664 -0.0519699 -0.0517099 -0.0514898 -0.0513291
-0.0511804 -0.0508944 -0.0506698 -0.0504821 -0.0502976 -0.0500014 -0.049752
-0.0495498 -0.0493794 -0.0492164 -0.0491137 -0.0490179 -0.0489206 -0.0487536
-0.048705 -0.0485629 -0.0484114 -0.0483275 -0.0482245 -0.0481604 -0.048118
-0.047976 -0.0479322 -0.0478274 -0.047769 -0.0477464 -0.0477403 -0.0477085
-0.0476126 -0.0475711 -0.0474861 -0.0474838 -0.0474081 -0.0473639 -0.0473372
-0.0472663 -0.0472569 -0.0472085 -0.0471547 -0.0471807 -0.047135 -0.0470305
-0.0470242 -0.0469583 -0.0468005 -0.0467489 -0.046665 -0.0466149 -0.0464467
-0.0463505 -0.0462314 -0.0461455 -0.046055 -0.0459574 -0.0458038 -0.045778
-0.045594 -0.0454578 -0.0454011 -0.0452462 -0.0450705 -0.0449786 -0.0448155
-0.0448036 -0.044667 -0.044555 -0.0444739 -0.0444287 -0.0442546 -0.0441377
-0.043986 -0.0439633 -0.0438065 -0.0436647 -0.0435226 -0.0433699 -0.0433
-0.0431101 -0.0430035 -0.0428785 -0.0426925 -0.0424775 -0.0423177 -0.0421248
-0.0419855 -0.0417961 -0.0416736 -0.0414864 -0.041199 -0.0409975 -0.0407872
-0.0406153 -0.0403243 -0.0401528 -0.0399459 -0.0397829 -0.0395043 -0.0393059
-0.0390992 -0.0389348 -0.0386398 -0.0383953 -0.0380931 -0.0379 -0.0376743
-0.0373464 -0.0370852 -0.0368011 -0.0365964 -0.0362602 -0.035986 -0.035669
-0.03538 -0.0350445 -0.0347804 -0.034501 -0.0341935 -0.0339841 -0.0337682
-0.0333977 -0.033066 -0.0327934 -0.0324504 -0.0321783 -0.0318218 -0.0315615
-0.0312293 -0.0309945 -0.0306973 -0.0304213 -0.0301965 -0.0299614 -0.0296917
-0.0293567 -0.0290326 -0.0288029 -0.0284955 -0.0281986 -0.0279075 -0.0275735
-0.0272845 -0.0270067 -0.0267769 -0.0265393 -0.0262503 -0.025928 -0.0257272
-0.0253825 -0.0251023 -0.0248366 -0.0245223 -0.0243082 -0.024033 -0.0237219
-0.0234685 -0.0231728 -0.0227921 -0.0225019 -0.0222634 -0.0219877 -0.0216288
-0.0213046 -0.0209588 -0.0206584 -0.0203751 -0.0200177 -0.0197139 -0.0193507
-0.0191444 -0.0187664 -0.0184444 -0.0181899 -0.0178312 -0.0175111 -0.0171447
-0.0169864 -0.0166326 -0.0163164 -0.0159966 -0.015767 -0.0154695 -0.0151789
-0.0149826 -0.0146641 -0.0144406 -0.0141761 -0.0139786 -0.0136878 -0.0135001
-0.013239 -0.0129363 -0.0127606 -0.0125418 -0.0121866 -0.01191 -0.0116006
-0.0113573 -0.0110826 -0.0108119 -0.0105212 -0.0102891 -0.00996294
-0.00962677 -0.00935767 -0.00902341 -0.00878692 -0.00853453 -0.00829003
-0.00802143 -0.00778846 -0.00752607 -0.00728529 -0.00704944 -0.00688579
-0.00673243 -0.00651065 -0.00632411 -0.00607753 -0.00587313 -0.00573118
-0.00547466 -0.00524567 -0.0050313 -0.00483479 -0.00450377 -0.00431003
-0.00415094 -0.00391427 -0.00369747 -0.00346897 -0.00319543 -0.00305602
-0.00277324 -0.00254064 -0.0023346 -0.00217169 -0.00191593 -0.0017256
-0.001543 -0.00128238 -0.00115564 -0.00090966 -0.000685158 -0.000534821
-0.000432644;
#A 1000 -0.000193492 1.93956e-05 0.000146277 0.000337406 0.000460456
0.000559949 0.000679817 0.000854864 0.00105511 0.00111045 0.00129386
0.00138726 0.00155881 0.00164447 0.00183307 0.00190289 0.00203188 0.0021097
0.00229695 0.00238 0.00251205 0.0026817 0.00272278 0.00292062 0.00301439
0.00307542 0.00321919 0.00332601 0.00336232 0.00348422 0.00343674 0.00362323
0.00368394 0.0037622 0.00377234 0.00386779 0.00395681 0.00406752 0.00412964
0.00419253 0.00432926 0.00449964 0.00456192 0.00480265 0.00491155 0.00507254
0.00512281 0.00532258 0.00546667 0.00557059 0.00569242 0.00586296 0.00606157
0.00613731 0.00636357 0.00651495 0.00662865 0.00680311 0.00688307 0.00714659
0.00724192 0.00742234 0.00748973 0.00772862 0.00783681 0.00799427 0.00818515
0.00831102 0.00844946 0.00856666 0.00864801 0.00871091 0.00882171 0.00890245
0.00889822 0.00897245 0.00904916 0.0091144 0.00909726 0.00915849 0.00929394
0.00939241 0.00946453 0.00955466 0.00971828 0.00974377 0.00986873 0.0100078
0.0101686 0.0103295 0.0103735 0.0105724 0.0107272 0.0108604 0.0110074
0.0112104 0.0113632 0.0115346 0.0117458 0.0119158 0.0120918 0.012271
0.0125118 0.012612 0.0128737 0.0131046 0.0132487 0.0133341 0.0135493
0.0137154 0.0139452 0.0141425 0.0143137 0.0145144 0.0146328 0.0148199
0.0149846 0.0150614 0.0152658 0.0153648 0.0154856 0.0155587 0.0157215
0.0157315 0.0158446 0.0158739 0.015968 0.0160357 0.0161246 0.0161907
0.0162029 0.0163377 0.0164871 0.0165751 0.0166055 0.0167231 0.0167967
0.0168087 0.0169068 0.0169975 0.0171425 0.0172537 0.0172804 0.0172581
0.0173371 0.0173386 0.01734 0.0173624 0.0173548 0.0173544 0.0173626
0.017402 0.0173754 0.0173999 0.0172794 0.0172779 0.0173245 0.0172803
0.017193 0.01722 0.0172336 0.0172432 0.0172418 0.0172894 0.0172843
0.0172529 0.017391 0.0173596 0.0174606 0.0174736 0.0174977 0.0175573
0.0175247 0.0175946 0.0175352 0.0174964 0.0175389 0.0174948 0.0175752
0.0175649 0.0175828 0.0175684 0.0175313 0.0175039 0.0175341 0.0174517
0.0174421 0.0173968 0.0173449 0.0172675 0.0172209 0.0171278 0.0170416
0.0168815 0.016874 0.0167889 0.0166796 0.0165494 0.0164527 0.0164117
0.0163631 0.0162714 0.0162031 0.0160763 0.0160363 0.015991 0.0158671
0.0158228 0.0157537 0.0156911 0.0155748 0.0155772 0.0156023 0.0155498
0.015615 0.0155738 0.0155895 0.0155183 0.0155287 0.0155157 0.01547
0.01541 0.0154426 0.0153602 0.0154247 0.0154369 0.0154274 0.0154282
0.0153748 0.0153527 0.0153099 0.0152678 0.0153307 0.0152619 0.0153012
0.0153575 0.0153056 0.0153243 0.0153015 0.015258 0.0151721 0.0151638
0.0151147 0.015066 0.0150518 0.0150106 0.0149157 0.014902 0.0148049
0.0147386 0.0145709 0.0145876 0.0144713 0.0144611 0.0143628 0.0141901
0.014136 0.0139884 0.0138576 0.0137492 0.0136668 0.0134903 0.0133679
0.0130967 0.0130114 0.0127819 0.0126287 0.0124783 0.0123986 0.0123013
0.0120569 0.0119348 0.0118179 0.0116453 0.0115713 0.0113893 0.0113021
0.0112663 0.0111301 0.0110568 0.0109771 0.0108901 0.0108449 0.0107585
0.0107335 0.0106557 0.0106191 0.010548 0.0104976 0.0104259 0.0104125
0.0103576 0.0102603 0.010187 0.0101624 0.0101207 0.0100761 0.0100848
0.00990312 0.009914 0.00980971 0.00973697 0.00957934 0.00948428 0.00948552
0.00937943 0.00934642 0.00931381 0.00933823 0.00934557 0.00918349 0.00924906
0.00921253 0.00925456 0.00916531 0.00920401 0.00918881 0.00918675 0.00915025
0.00910903 0.00909608 0.00914879 0.00906421 0.00913857 0.00914589 0.00916487
0.00921864 0.00923146 0.00935695 0.00934903 0.00937778 0.00947746 0.00956559
0.00966487 0.00969081 0.00980475 0.00984618 0.00987062 0.00998007 0.0100736
0.0101888 0.0102986 0.0103586 0.0104027 0.0104887 0.0105409 0.0106659
0.0107683 0.0107854 0.0108649 0.010864 0.0109248 0.0109679 0.0109907
0.0110549 0.0110806 0.0112105 0.0112219 0.0112767 0.0113928 0.0114029
0.011515 0.0115516 0.0115604 0.0116925 0.0117169 0.0118144 0.0118655
0.0119551 0.0120001 0.0121048 0.0122042 0.0123135 0.0124067 0.0124744
0.0126571 0.0127339 0.0128481 0.012932 0.0130137 0.0131192 0.0132511
0.0132279 0.0134564 0.0135239 0.0135624 0.0136951 0.0138248 0.0139177
0.014031 0.014148 0.014315 0.0144515 0.0145919 0.0147031 0.0147017
0.0149012 0.015 0.0150847 0.0151932 0.0153642 0.0154374 0.0155902 0.0156332
0.0157717 0.0158642 0.0159016 0.0160433 0.0161077 0.0161898 0.0162392
0.016414 0.0165232 0.0166635 0.0167721 0.0168756 0.0168969 0.0169812
0.0169832 0.017062 0.0170924 0.0171096 0.0171579 0.0171334 0.017226
0.0172607 0.0173144 0.0173272 0.0174383 0.0174782 0.0175959 0.0177145
0.017778 0.0177895 0.0178543 0.0180191 0.0180572 0.0181101 0.0182192
0.0182739 0.0182859 0.0182842 0.0183141 0.0184134 0.0184775 0.0185851
0.0186139 0.0186022 0.018725 0.0188395 0.0189035 0.018922 0.019012
0.0190363 0.0191104 0.0191426 0.0192781 0.019326 0.0194659 0.0194903
0.0196856 0.019823 0.0199596 0.0200124 0.0202377 0.0203867 0.0206202
0.0208481 0.0210472 0.0212776 0.0214624 0.021618 0.0218422 0.022 0.0222191
0.022403 0.0225818 0.0227366 0.022933 0.0230602 0.0232585 0.0234736
0.0235966 0.0237642 0.023857 0.0240103 0.0240356 0.0242168 0.0243679
0.024431 0.0246279 0.0247366 0.0248855 0.0249572 0.0251272 0.02519
0.0253485 0.0254317 0.0256564 0.0258129 0.0259535 0.0260538 0.0262921
0.0264765 0.0265998 0.0267212 0.0268444 0.0269949 0.02714 0.0272798
0.0274027 0.0274252 0.027589 0.0276796 0.0277366 0.0278831 0.0279223
0.0279677 0.0280822 0.0281725 0.0282768 0.0283315 0.0285114 0.0286219
0.0288278 0.0289565 0.0290756 0.0292015 0.0293059 0.0294485 0.0296166
0.0297082 0.0299231 0.0300756 0.0302485 0.0303421 0.0305095 0.030622
0.0307407 0.0309101 0.0310688 0.0312573 0.0313195 0.0314193 0.0316079
0.0317215 0.0318471 0.0320145 0.0321633 0.0323186 0.0323259 0.0324411
0.0325631 0.0326088 0.0327153 0.032771 0.032812 0.0328226 0.0328711
0.0330232 0.0330792 0.0331499 0.0331991 0.0333941 0.0335062 0.0336556
0.0336743 0.0338327 0.0340079 0.034116 0.0343739 0.0344431 0.0346731
0.0348349 0.0350188 0.0351453 0.0353179 0.0355114 0.0355998 0.0357559
0.0359776 0.0360894 0.0362449 0.0364758 0.0366522 0.0367969 0.0369277
0.0369616 0.0371524 0.0373287 0.0373869 0.0376033 0.0377183 0.0378404
0.0379558 0.0380831 0.0381938 0.0382684 0.0384595 0.0385497 0.0386675
0.038714 0.0388442 0.0389498 0.0390201 0.0390279 0.0390959 0.0392488
0.0392581 0.0392508 0.0393075 0.0394593 0.039551 0.0395969 0.0396895
0.0397378 0.0397897 0.0398328 0.0399486 0.0400384 0.040077 0.040165
0.0401833 0.0403033 0.040339 0.04043 0.0404403 0.0405337 0.040565 0.0406764
0.0407709 0.0408673 0.0409515 0.0410823 0.0410589 0.0412812 0.041345
0.0413992 0.0415571 0.0416127 0.0418347 0.0419528 0.0421041 0.0423333
0.0425184 0.0427334 0.0429096 0.0430483 0.0432669 0.0434592 0.0435311
0.0436356 0.0437986 0.0438613 0.0440041 0.0440173 0.044182 0.0442649
0.0443425 0.0445724 0.0446627 0.0447332 0.0448973 0.044949 0.0450661
0.0451414 0.0451378 0.0451878 0.0452339 0.0452939 0.0452301 0.0452147
0.0452766 0.0452501 0.0452053 0.0452808 0.0452371 0.0452729 0.0451563
0.0451648 0.045182 0.045182 0.0451696 0.0451727 0.0451865 0.0451832
0.0451895 0.0452302 0.0452249 0.0452929 0.0452696 0.0453255 0.045416
0.0454718 0.0455779 0.0456389 0.0456766 0.0457527 0.045765 0.0458649
0.0459539 0.0460614 0.0460905 0.0460533 0.0461733 0.0462538 0.0462705
0.0463972 0.0464747 0.0465094 0.0465898 0.0465912 0.0466791 0.0467576
0.0467274 0.0467257 0.0467288 0.0466608 0.0466485 0.0465802 0.0464613
0.0462954 0.0462732 0.0461922 0.0460905 0.0460145 0.045805 0.0457344
0.0455863 0.0454797 0.0452143 0.0451927 0.0450268 0.0448887 0.0447615
0.0446668 0.04458 0.0444395 0.0442559 0.0440482 0.0439342 0.0437193
0.043519 0.0432567 0.0431252 0.0429516 0.0427048 0.0425246 0.0423523
0.0421416 0.0419899 0.041795 0.0416311 0.0414363 0.0412948 0.041135
0.0409717 0.0408057 0.0407362 0.0405778 0.0405104 0.0403657 0.0402092
0.0402124 0.0400714 0.0399815 0.0398817 0.0396868 0.0396364 0.0394694
0.0394101 0.0392262 0.0391256 0.0390772 0.038931 0.0388409 0.0387906
0.0386755 0.0385833 0.0385353 0.0384058 0.0382182 0.0381661 0.0380283
0.0379802 0.0378946 0.0378405 0.0377583 0.0377085 0.0376174 0.0375745
0.037491 0.0374712 0.0374141 0.0374167 0.0372555 0.0372439 0.0371817
0.0370646 0.0370274 0.0370271 0.0370156 0.0369477 0.0368688 0.0368948
0.036883 0.0368199 0.0367536 0.0367801 0.0367735 0.0367395 0.0366975
0.0366618 0.0366161 0.0364939 0.0364568 0.0364135 0.0363688 0.0362709
0.0362607 0.0361863 0.0361565 0.0360579 0.0360477 0.0359217 0.0358442
0.0356818 0.0357088 0.0355821 0.0355319 0.035379 0.0352925 0.0352323
0.0350806 0.0350814 0.0350093 0.0348783 0.0347353 0.0346285 0.0345618
0.0344991 0.0343651 0.0343857 0.0342194 0.0341776 0.0340509 0.0339504
0.0338709 0.0337346 0.0336322 0.0335236 0.0333158 0.0332673 0.0332086
0.0330082 0.0329388 0.0327631 0.0326867 0.0324912 0.0324608 0.0323675
0.032271 0.0321795 0.0319929 0.0319314 0.0318736 0.0317076 0.0315655
0.0314902 0.0313532 0.0312084 0.0310904 0.0310024 0.0308205 0.0307243
0.0305132 0.0304309 0.0303002 0.0301578 0.0300647 0.0299695 0.0299217
0.029758 0.0296683 0.0296292 0.0295192 0.0294391 0.0294229 0.0293592
0.0293836 0.0292865 0.0293198 0.0293188 0.0293224 0.0292983 0.0292893
0.0292858 0.0292492 0.0292147 0.0293295 0.0292961 0.0293053 0.0293405
0.0294123 0.0293965 0.0293812 0.0293576 0.0293643 0.029456 0.0294938
0.0294416 0.0295637 0.0295766 0.0296206 0.0295505 0.0296483 0.0296318
0.029568 0.0295879 0.0295828 0.0294819 0.0294781 0.0294149 0.0293486
0.0293527 0.0294034 0.0293433 0.0294378 0.029421 0.0294464 0.0295297
0.0295717 0.0296514 0.0296883 0.0297618 0.0297599 0.0298128 0.0298316
0.0298708 0.0298357 0.0298999 0.029896 0.0299136 0.029976 0.0300033
0.0300006 0.0300449 0.0301596 0.0301828 0.0302328 0.030193 0.0303348
0.0303242 0.0303647 0.0302791 0.0303301 0.0303026 0.0303048 0.0302909
0.0302869 0.0302809 0.0302852 0.0303248 0.030309 0.0304146 0.0304464
0.030493 0.0304956 0.0305908 0.0306066 0.0306961 0.0307467 0.0308562
0.0308311 0.0308424 0.0309305 0.0310467 0.0311254 0.0311584 0.0312902
0.0313467 0.0313726 0.0314308 0.0314316 0.0315255 0.0315359 0.0315449
0.0314601 0.0315369 0.0315364 0.0315171 0.0315291 0.0314837 0.0314094
0.0313807 0.031283 0.0311611 0.0310711 0.0309712 0.0307403;
#A 2000 0.0306282 0.0304579 0.0303964 0.0302177 0.0300919 0.0300265
0.0298528 0.0297144 0.0296567 0.029547 0.0294536 0.0293949 0.0292615
0.0291061 0.0290859 0.0289911 0.0288893 0.0287324 0.0286934 0.0285661
0.0284443 0.0283056 0.0281347 0.0279722 0.0279243 0.0277524 0.0276871
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Download waveguide_engine.pd.

Audio

Vehicle engine sounds

First part of example is engine pulse piston model (exhaust side), second part is a four stroke model with transmission, waveguide models of exhaust and body.

Download engines.wav.

Code examples for “Designing Sound” textbook

Practical 22: Car Engines

Pure Data

Engines - simple boat engine effect

Engines - getting parabolic pulses

Engines - a four stroke engine with jitter

Engines - warped waveguide engine algorithm

Audio

Vehicle engine sounds