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|00000000| 53 79 6e 32 02 00 00 00 | 00 00 00 ee 56 00 00 64 |Syn2....|....V..d|
|00000010| 00 00 00 00 3b 58 08 80 | 84 1e 00 08 01 01 80 84 |....;X..|........|
|00000020| 1e 00 00 12 7a 00 01 00 | 15 00 00 00 23 73 6f 6e |....z...|....#son|
|00000030| 67 20 70 6f 73 74 70 72 | 6f 63 65 73 73 69 6e 67 |g postpr|ocessing|
|00000040| 0a 02 00 00 00 02 1a 00 | 2f 00 f4 01 22 01 11 00 |........|/..."...|
|00000050| 00 00 52 65 73 6f 6e 61 | 6e 74 20 53 61 77 74 6f |..Resona|nt Sawto|
|00000060| 6f 74 68 00 00 00 00 00 | 00 00 00 01 00 00 00 00 |oth.....|........|
|00000070| 00 40 42 0f 00 00 00 00 | 00 00 00 00 00 00 00 00 |.@B.....|........|
|00000080| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 40 42 0f |........|.....@B.|
|00000090| 00 40 42 0f 00 00 00 00 | 00 00 40 42 0f 00 00 00 |.@B.....|..@B....|
|000000a0| 00 00 00 00 00 00 00 01 | 01 11 00 00 00 52 65 73 |........|.....Res|
|000000b0| 6f 6e 61 6e 74 20 53 61 | 77 74 6f 6f 74 68 00 18 |onant Sa|wtooth..|
|000000c0| 00 00 00 23 63 68 61 6e | 6e 65 6c 20 70 6f 73 74 |...#chan|nel post|
|000000d0| 70 72 6f 63 65 73 73 69 | 6e 67 0a 02 01 00 00 00 |processi|ng......|
|000000e0| 01 00 00 00 09 94 28 00 | c0 00 00 00 00 00 00 00 |......(.|........|
|000000f0| 00 00 00 00 e8 03 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000100| 00 00 ff ff e8 03 e8 03 | 00 00 e8 03 00 00 00 00 |........|........|
|00000110| 00 00 02 1a 00 2f 00 f4 | 01 22 01 0f 00 00 00 52 |...../..|.".....R|
|00000120| 65 73 6f 6e 61 6e 74 20 | 53 71 75 61 72 65 00 00 |esonant |Square..|
|00000130| 00 00 00 00 00 00 01 00 | 00 00 00 00 40 42 0f 00 |........|....@B..|
|00000140| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00000150| 00 00 00 00 00 00 00 00 | 40 42 0f 00 40 42 0f 00 |........|@B..@B..|
|00000160| 00 00 00 00 00 40 42 0f | 00 00 00 00 00 00 00 00 |.....@B.|........|
|00000170| 00 00 01 01 0f 00 00 00 | 52 65 73 6f 6e 61 6e 74 |........|Resonant|
|00000180| 20 53 71 75 61 72 65 00 | 18 00 00 00 23 63 68 61 | Square.|....#cha|
|00000190| 6e 6e 65 6c 20 70 6f 73 | 74 70 72 6f 63 65 73 73 |nnel pos|tprocess|
|000001a0| 69 6e 67 0a 02 03 00 00 | 00 01 00 00 00 09 96 28 |ing.....|.......(|
|000001b0| 00 c0 00 00 00 00 00 00 | 00 00 00 00 00 e8 03 00 |........|........|
|000001c0| 00 00 00 00 00 00 00 00 | 00 00 00 ff ff e8 03 e8 |........|........|
|000001d0| 03 00 00 e8 03 00 00 01 | 00 00 00 05 96 28 00 c0 |........|.....(..|
|000001e0| 00 00 00 00 00 00 00 00 | 00 00 00 e8 03 00 00 00 |........|........|
|000001f0| 00 00 00 00 00 00 00 00 | 00 ff ff e8 03 e8 03 00 |........|........|
|00000200| 00 e8 03 00 00 01 00 00 | 00 09 94 28 00 c0 00 00 |........|...(....|
|00000210| 00 00 00 00 00 00 00 00 | 00 e8 03 00 00 00 00 00 |........|........|
|00000220| 00 00 00 00 00 00 00 ff | ff e8 03 e8 03 00 00 e8 |........|........|
|00000230| 03 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 05 |........|........|
|00000240| 00 00 00 01 0f 00 28 00 | 67 02 4b 01 0c 00 00 00 |......(.|g.K.....|
|00000250| 52 65 73 6f 6e 20 46 69 | 6c 74 65 72 9b 06 00 00 |Reson Fi|lter....|
|00000260| 23 20 73 65 63 6f 6e 64 | 20 6f 72 64 65 72 20 72 |# second| order r|
|00000270| 65 63 75 72 73 69 76 65 | 20 66 69 6c 74 65 72 2e |ecursive| filter.|
|00000280| 0a 23 20 66 72 6f 6d 20 | 41 70 70 65 6e 64 69 78 |.# from |Appendix|
|00000290| 20 28 70 61 67 65 20 33 | 34 39 2d 33 35 30 29 20 | (page 3|49-350) |
|000002a0| 6f 66 0a 23 20 44 6f 64 | 67 65 2c 20 43 68 61 72 |of.# Dod|ge, Char|
|000002b0| 6c 65 73 20 61 6e 64 20 | 4a 65 72 73 65 2c 20 54 |les and |Jerse, T|
|000002c0| 68 6f 6d 61 73 20 41 2e | 0a 23 20 43 6f 6d 70 75 |homas A.|.# Compu|
|000002d0| 74 65 72 20 4d 75 73 69 | 63 3a 20 20 53 79 6e 74 |ter Musi|c:  Synt|
|000002e0| 68 65 73 69 73 2c 20 43 | 6f 6d 70 6f 73 69 74 69 |hesis, C|ompositi|
|000002f0| 6f 6e 2c 20 61 6e 64 20 | 50 65 72 66 6f 72 6d 61 |on, and |Performa|
|00000300| 6e 63 65 0a 23 20 53 63 | 68 69 72 6d 65 72 20 42 |nce.# Sc|hirmer B|
|00000310| 6f 6f 6b 73 2c 20 4e 65 | 77 20 59 6f 72 6b 2c 20 |ooks, Ne|w York, |
|00000320| 31 39 38 35 0a 0a 23 20 | 66 69 6c 74 65 72 20 73 |1985..# |filter s|
|00000330| 65 74 20 75 70 20 66 75 | 6e 63 74 69 6f 6e 0a 23 |et up fu|nction.#|
|00000340| 20 20 20 63 66 20 3d 20 | 63 65 6e 74 65 72 20 66 |   cf = |center f|
|00000350| 72 65 71 75 65 6e 63 79 | 20 69 6e 20 48 65 72 74 |requency| in Hert|
|00000360| 7a 2e 0a 23 20 20 20 62 | 77 20 3d 20 33 20 64 42 |z..#   b|w = 3 dB|
|00000370| 20 62 61 6e 64 77 69 64 | 74 68 20 69 6e 20 48 65 | bandwid|th in He|
|00000380| 72 74 7a 0a 23 20 20 20 | 73 63 6c 20 3d 20 61 6d |rtz.#   |scl = am|
|00000390| 70 6c 69 74 75 64 65 20 | 73 63 61 6c 69 6e 67 20 |plitude |scaling |
|000003a0| 6d 65 74 68 6f 64 0a 23 | 20 20 20 20 20 30 20 3d |method.#|     0 =|
|000003b0| 20 6e 6f 20 73 63 61 6c | 69 6e 67 0a 23 20 20 20 | no scal|ing.#   |
|000003c0| 20 20 31 20 3d 20 67 61 | 69 6e 20 3d 20 31 20 61 |  1 = ga|in = 1 a|
|000003d0| 74 20 63 66 0a 23 20 20 | 20 20 20 32 20 3d 20 67 |t cf.#  |   2 = g|
|000003e0| 61 69 6e 20 3d 20 31 20 | 6f 6e 20 77 68 69 74 65 |ain = 1 |on white|
|000003f0| 20 6e 6f 69 73 65 20 69 | 6e 70 75 74 0a 23 20 20 | noise i|nput.#  |
|00000400| 20 73 72 20 3d 20 73 61 | 6d 70 6c 69 6e 67 20 72 | sr = sa|mpling r|
|00000410| 61 74 65 20 69 6e 20 48 | 65 72 74 7a 0a 23 20 20 |ate in H|ertz.#  |
|00000420| 20 72 65 74 75 72 6e 73 | 20 61 72 72 61 79 20 66 | returns| array f|
|00000430| 6f 72 20 77 6f 72 6b 73 | 70 61 63 65 0a 66 75 6e |or works|pace.fun|
|00000440| 63 20 72 73 6e 73 65 74 | 28 63 66 3a 64 6f 75 62 |c rsnset|(cf:doub|
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|00000470| 65 29 20 3a 20 64 6f 75 | 62 6c 65 61 72 72 61 79 |e) : dou|blearray|
|00000480| 0a 09 28 0a 09 09 76 61 | 72 20 61 3a 64 6f 75 62 |..(...va|r a:doub|
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|000004a0| 74 20 61 5b 32 5d 20 3a | 3d 20 65 78 70 28 2d 20 |t a[2] :|= exp(- |
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|000004c0| 29 3b 0a 09 09 76 61 72 | 20 63 3a 64 6f 75 62 6c |);...var| c:doubl|
|000004d0| 65 20 3d 20 31 20 2b 20 | 61 5b 32 5d 3b 0a 09 09 |e = 1 + |a[2];...|
|000004e0| 73 65 74 20 61 5b 31 5d | 20 3a 3d 20 2d 34 20 2a |set a[1]| := -4 *|
|000004f0| 20 61 5b 32 5d 20 2f 20 | 63 20 2a 20 63 6f 73 28 | a[2] / |c * cos(|
|00000500| 32 20 2a 20 70 69 20 2a | 20 63 66 20 2f 20 73 72 |2 * pi *| cf / sr|
|00000510| 29 3b 0a 09 09 69 66 20 | 28 73 63 6c 20 3d 20 32 |);...if |(scl = 2|
|00000520| 29 20 74 68 65 6e 0a 09 | 09 09 73 65 74 20 61 5b |) then..|..set a[|
|00000530| 30 5d 20 3a 3d 20 73 71 | 72 74 28 28 31 20 2d 20 |0] := sq|rt((1 - |
|00000540| 61 5b 32 5d 29 20 2f 20 | 63 20 2a 20 28 63 20 2a |a[2]) / |c * (c *|
|00000550| 20 63 20 2d 20 61 5b 31 | 5d 20 2a 20 61 5b 31 5d | c - a[1|] * a[1]|
|00000560| 29 29 0a 09 09 65 6c 73 | 65 20 69 66 20 28 73 63 |))...els|e if (sc|
|00000570| 6c 20 3d 20 31 29 20 74 | 68 65 6e 0a 09 09 09 73 |l = 1) t|hen....s|
|00000580| 65 74 20 61 5b 30 5d 20 | 3a 3d 20 28 31 20 2d 20 |et a[0] |:= (1 - |
|00000590| 61 5b 32 5d 29 20 2a 20 | 73 71 72 74 28 31 20 2d |a[2]) * |sqrt(1 -|
|000005a0| 20 61 5b 31 5d 20 2a 20 | 61 5b 31 5d 20 2f 20 28 | a[1] * |a[1] / (|
|000005b0| 34 20 2a 20 61 5b 32 5d | 29 29 0a 09 09 65 6c 73 |4 * a[2]|))...els|
|000005c0| 65 0a 09 09 09 73 65 74 | 20 61 5b 30 5d 20 3a 3d |e....set| a[0] :=|
|000005d0| 20 31 3b 0a 09 09 61 0a | 09 29 3b 0a 0a 23 20 61 | 1;...a.|.);..# a|
|000005e0| 70 70 6c 79 20 74 68 65 | 20 66 69 6c 74 65 72 20 |pply the| filter |
|000005f0| 74 6f 20 6f 6e 65 20 73 | 61 6d 70 6c 65 0a 23 20 |to one s|ample.# |
|00000600| 20 20 78 69 6e 20 3d 20 | 73 61 6d 70 6c 65 20 70 |  xin = |sample p|
|00000610| 6f 69 6e 74 20 69 6e 20 | 5b 2d 31 2e 2e 31 5d 0a |oint in |[-1..1].|
|00000620| 23 20 20 20 61 20 3d 20 | 77 6f 72 6b 73 70 61 63 |#   a = |workspac|
|00000630| 65 20 61 72 72 61 79 0a | 23 20 20 20 72 65 74 75 |e array.|#   retu|
|00000640| 72 6e 73 20 74 68 65 20 | 6e 65 77 20 73 61 6d 70 |rns the |new samp|
|00000650| 6c 65 20 70 6f 69 6e 74 | 0a 66 75 6e 63 20 72 65 |le point|.func re|
|00000660| 73 6f 6e 28 78 69 6e 3a | 64 6f 75 62 6c 65 2c 20 |son(xin:|double, |
|00000670| 61 3a 64 6f 75 62 6c 65 | 61 72 72 61 79 29 20 3a |a:double|array) :|
|00000680| 20 64 6f 75 62 6c 65 0a | 09 28 0a 09 09 76 61 72 | double.|.(...var|
|00000690| 20 79 69 3a 64 6f 75 62 | 6c 65 20 3d 20 61 5b 30 | yi:doub|le = a[0|
|000006a0| 5d 20 2a 20 78 69 6e 20 | 2d 20 61 5b 31 5d 20 2a |] * xin |- a[1] *|
|000006b0| 20 61 5b 33 5d 20 2d 20 | 61 5b 32 5d 20 2a 20 61 | a[3] - |a[2] * a|
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|00000710| 6c 65 73 2e 20 20 6f 6e | 65 20 70 61 73 73 20 69 |les.  on|e pass i|
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