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◯ᗩIᗝ⋏ᗩ◯⚪◯ᗩ⋏ᗝIᗩ◯ⵙ◯ᗩIᗝ⋏ᗩ◯⚪◯ᗩ⋏ᗝIᗩ◯/◯ᗱᗴᴥᗩᗯ✤⏀Ⓞᔓᔕ◯⚪◯ᔓᔕⓄ⏀✤ᗯᗩᴥᗱᗴ◯ⵙ◯ᗱᗴᴥᗩᗯ✤⏀Ⓞᔓᔕ◯⚪◯ᔓᔕⓄ⏀✤ᗯᗩᴥᗱᗴ◯/◯ᴥᗱᗴߦᗩᗱᗴᴥ◯ᔓᔕⓄ✻ᑐᑕⓄᑐᑕ◯⚪◯ᑐᑕⓄᑐᑕ✻Ⓞᔓᔕ◯ᴥᗱᗴᗩߦᗱᗴᴥ◯ⵙ◯ᴥᗱᗴߦᗩᗱᗴᴥ◯ᔓᔕⓄ✻ᑐᑕⓄᑐᑕ◯⚪◯ᑐᑕⓄᑐᑕ✻Ⓞᔓᔕ◯ᴥᗱᗴᗩߦᗱᗴᴥ◯/◯ꕤ⏀ᔓᔕᒍᒐ◯⚪◯ᒍᒐᔓᔕ⏀ꕤ◯ⵙ◯ꕤ⏀ᔓᔕᒍᒐ◯⚪◯ᒍᒐᔓᔕ⏀ꕤ◯/⠀⠀⠀⠀ⵙᴥⵙⓄⵙ✤ⵙᗩⵙᴥⵙᗱᗴⵙИNⵙᗱᗴⵙᕤᕦⵙᗱᗴⵙᔓᔕⵙꖴⵙⓄⵙИNⵙ◯ⵙ✤ⵙᗱᗴⵙᗯⵙᙁⵙᗱᗴⵙᗯⵙ◯ⵙИNⵙᗩⵙꖴⵙᔓᔕⵙᑎⵙᗩⵙᕤᕦⵙ⠀⠀⠀⠀◯⠀⠀⠀⠀ⵙ⠀⠀⠀⠀◯⠀⠀⠀⠀ⵙᕤᕦⵙᗩⵙᑎⵙᔓᔕⵙꖴⵙᗩⵙИNⵙ◯ⵙᗯⵙᗱᗴⵙᙁⵙᗯⵙᗱᗴⵙ✤ⵙ◯ⵙИNⵙⓄⵙꖴⵙᔓᔕⵙᗱᗴⵙᕤᕦⵙᗱᗴⵙИNⵙᗱᗴⵙᴥⵙᗩⵙ✤ⵙⓄⵙᴥⵙ⠀⠀⠀⠀
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◯ᗩIᗝ⋏ᗩ◯⚪◯ᗩ⋏ᗝIᗩ◯ⵙ◯ᗩIᗝ⋏ᗩ◯⚪◯ᗩ⋏ᗝIᗩ◯/◯ᗱᗴᴥᗩᗯ✤⏀Ⓞᔓᔕ◯⚪◯ᔓᔕⓄ⏀✤ᗯᗩᴥᗱᗴ◯ⵙ◯ᗱᗴᴥᗩᗯ✤⏀Ⓞᔓᔕ◯⚪◯ᔓᔕⓄ⏀✤ᗯᗩᴥᗱᗴ◯/◯ᴥᗱᗴߦᗩᗱᗴᴥ◯ᔓᔕⓄ✻ᑐᑕⓄᑐᑕ◯⚪◯ᑐᑕⓄᑐᑕ✻Ⓞᔓᔕ◯ᴥᗱᗴᗩߦᗱᗴᴥ◯ⵙ◯ᴥᗱᗴߦᗩᗱᗴᴥ◯ᔓᔕⓄ✻ᑐᑕⓄᑐᑕ◯⚪◯ᑐᑕⓄᑐᑕ✻Ⓞᔓᔕ◯ᴥᗱᗴᗩߦᗱᗴᴥ◯/◯ꕤ⏀ᔓᔕᒍᒐ◯⚪◯ᒍᒐᔓᔕ⏀ꕤ◯ⵙ◯ꕤ⏀ᔓᔕᒍᒐ◯⚪◯ᒍᒐᔓᔕ⏀ꕤ◯/⠀⠀⠀⠀ⵙᴥⵙⓄⵙ✤ⵙᗩⵙᴥⵙᗱᗴⵙИNⵙᗱᗴⵙᕤᕦⵙᗱᗴⵙᔓᔕⵙꖴⵙⓄⵙИNⵙ◯ⵙ✤ⵙᗱᗴⵙᗯⵙᙁⵙᗱᗴⵙᗯⵙ◯ⵙИNⵙᗩⵙꖴⵙᔓᔕⵙᑎⵙᗩⵙᕤᕦⵙ⠀⠀⠀⠀◯⠀⠀⠀⠀ⵙ⠀⠀⠀⠀◯⠀⠀⠀⠀ⵙᕤᕦⵙᗩⵙᑎⵙᔓᔕⵙꖴⵙᗩⵙИNⵙ◯ⵙᗯⵙᗱᗴⵙᙁⵙᗯⵙᗱᗴⵙ✤ⵙ◯ⵙИNⵙⓄⵙꖴⵙᔓᔕⵙᗱᗴⵙᕤᕦⵙᗱᗴⵙИNⵙᗱᗴⵙᴥⵙᗩⵙ✤ⵙⓄⵙᴥⵙ⠀⠀⠀⠀
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desc:O____ROTARENEG_ESION_TEWLEW_NAISUAG____O____GAUSIAN_WELWET_NOISE_GENERATOR____O |
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//tags: analysis generator synthesis |
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//author: SCHWA |
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// Generator choices are listed in rough order of fanciness and cost. |
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slider1:-16<-120,6,0.1>Noise dB (RMS) |
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slider2:0.5<0,1,0.01>Wet Mix |
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slider3:1<0,3,1{Central Limit Approximation,Box-Muller,Ziggurat (not implemented yet),Inverse Transform}>Gaussian Generator |
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slider4:0<-1,1>Noise Mean (should be ~0) |
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slider5:0<0,2>Noise Standard Deviation (should be ~1) |
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in_pin:left input |
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in_pin:right input |
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out_pin:left output |
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out_pin:right output |
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@init |
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AMP_DB = 20.0 / log(10); |
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CENTRAL_LIMIT = 0; |
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BOX_MULLER = 1; |
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ZIGGURAT = 2; |
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INV_TRANSFORM = 3; |
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@slider |
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noise_level = exp(slider1 / AMP_DB); |
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(slider3 == CENTRAL_LIMIT) ? ( |
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N_DEV = 12; |
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) |
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: |
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(slider3 == INV_TRANSFORM) ? ( |
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A1 = -39.69683028665376; |
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A2 = 220.9460984245205; |
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A3 = -275.9285104469687; |
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A4 = 138.3577518672690; |
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A5 = -30.66479806614716; |
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A6 = 2.506628277459239; |
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B1 = -54.47609879822406; |
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B2 = 161.5858368580409; |
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B3 = -155.6989798598866; |
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B4 = 66.80131188771972; |
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B5 = -13.28068155288572; |
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C1 = -0.007784894002430293; |
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C2 = -0.3223964580411365; |
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C3 = -2.400758277161838; |
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C4 = -2.549732539343734; |
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C5 = 4.374664141464968; |
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C6 = 2.938163982698783; |
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D1 = 0.007784695709041462; |
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D2 = 0.3224671290700398; |
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D3 = 2.445134137142996; |
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D4 = 3.754408661907416; |
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P_LO = 0.02425; |
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P_HI = 1.0 - P_LO; |
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); |
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i = sum = sum2 = 0; |
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@sample |
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z0 = z1 = 0; |
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(slider3 == CENTRAL_LIMIT) ? ( |
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// Quick & dirty. |
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loop (N_DEV, |
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z0 += rand(1); |
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z1 += rand(1); |
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); |
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z0 -= N_DEV / 2.0; |
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z1 -= N_DEV / 2.0; |
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) |
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: |
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(slider3 == BOX_MULLER) ? ( |
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// Conveniently a stereo twofer. |
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w = 0; |
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while ( |
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z0 = 2.0 * rand(1) - 1.0; |
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z1 = 2.0 * rand(1) - 1.0; |
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w = z0 * z0 + z1 * z1; |
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w >= 1.0; |
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); |
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w = sqrt(-2.0 * log(w) / w); |
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z0 *= w; |
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z1 *= w; |
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) |
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: |
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(slider3 == INV_TRANSFORM) ? ( |
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r0 = rand(1); |
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r1 = rand(1); |
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(r0 < P_LO) ? ( |
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q = sqrt(-2.0 * log(r0)); |
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z0 = ((((C1 * q + C2) * q + C3) * q + C4) * q + C5) * q + C6; |
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z0 /= (((D1 * q + D2) * q + D3) * q + D4) * q + 1.0; |
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) |
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: |
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(r0 < P_HI) ? ( |
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q = r0 - 0.5; |
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r = q * q; |
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z0 = (((((A1 * r + A2) * r + A3) * r + A4) * r + A5) * r + A6) * q; |
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z0 /= ((((B1 * r + B2) * r + B3) * r + B4) * r + B5) * r + 1.0; |
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) |
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: |
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( |
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q = sqrt(-2.0 * log(1.0 - r0)); |
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z0 = -(((((C1 * q + C2) * q + C3) * q + C4) * q + C5) * q + C6); |
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z0 /= (((D1 * q + D2) * q + D3) * q + D4) * q + 1.0; |
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); |
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(r1 < P_LO) ? ( |
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q = sqrt(-2.0 * log(r1)); |
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z1 = ((((C1 * q + C2) * q + C3) * q + C4) * q + C5) * q + C6; |
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z1 /= (((D1 * q + D2) * q + D3) * q + D4) * q + 1.0; |
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) |
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: |
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(r1 < P_HI) ? ( |
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q = r1 - 0.5; |
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r = q * q; |
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z1 = (((((A1 * r + A2) * r + A3) * r + A4) * r + A5) * r + A6) * q; |
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z1 /= ((((B1 * r + B2) * r + B3) * r + B4) * r + B5) * r + 1.0; |
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) |
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: |
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( |
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q = sqrt(-2.0 * log(1.0 - r0)); |
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z1 = -(((((C1 * q + C2) * q + C3) * q + C4) * q + C5) * q + C6); |
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z1 /= (((D1 * q + D2) * q + D3) * q + D4) * q + 1.0; |
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); |
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); |
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spl0 = ((FLOOR(spl0 * (1.0 - slider2) + z0 * noise_level * slider2))+.5)/6; |
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spl1 = ((FLOOR(spl1 * (1.0 - slider2) + z1 * noise_level * slider2))+.5)/6; |
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//spl0 = spl0 * (1.0 - slider2) + z0 * noise_level * slider2; |
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//spl1 = spl1 * (1.0 - slider2) + z1 * noise_level * slider2; |
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sum += z0; |
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sum2 += z0 * z0; |
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i += 1; |
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(i == srate) ? ( |
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mean = sum / srate; |
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stdev = sqrt(sum2 / srate - mean * mean); |
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slider4 = mean; |
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slider5 = stdev; |
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sliderchange(2^4 + 2^5); |
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i = sum = sum2 = 0; |
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); |
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