interpretor/preprocessor/faust-0.9.47mr3/examples/faust-stk/voiceForm.dsp

   1 declare name "Voice Formant";
   2 declare description "Voice Formant Instrument";
   3 declare author "Romain Michon (rmichon@ccrma.stanford.edu)";
   4 declare copyright "Romain Michon";
   5 declare version "1.0";
   6 declare licence "STK-4.3"; // Synthesis Tool Kit 4.3 (MIT style license);
   7 declare description "This instrument contains an excitation singing wavetable (looping wave with random and periodic vibrato, smoothing on frequency, etc.), excitation noise, and four sweepable complex resonances. Phoneme preset numbers: 0->eee (beet), 1->ihh (bit), 2->ehh (bet), 3->aaa (bat), 4->ahh (father), 5->aww (bought), 6->ohh (bone), 7->uhh (but), 8->uuu (foot), 9->ooo (boot), 10->rrr (bird), 11->lll (lull), 12->mmm (mom), 13->nnn (nun), 14->nng (sang), 15->ngg (bong), 16->fff, 17->sss, 18->thh, 19->shh, 20->xxx, 21->hee (beet), 22->hoo (boot), 23->hah (father), 24->bbb, 25->ddd, 26->jjj, 27->ggg, 28->vvv, 29->zzz, 30->thz, 31->zhh";
   8
   9 import("music.lib");
  10 import("oscillator.lib");
  11 import("instrument.lib");
  12
  13 //==================== GUI SPECIFICATION ================
  14
  15 freq = nentry("h:Basic_Parameters/freq [1][unit:Hz] [tooltip:Tone frequency]",440,20,20000,1);
  16 gain = nentry("h:Basic_Parameters/gain [1][tooltip:Gain (value between 0 and 1)]",1,0,1,0.01);
  17 gate = button("h:Basic_Parameters/gate [1][tooltip:noteOn = 1, noteOff = 0]");
  18
  19 phoneme = hslider("v:Physical_Parameters/Phoneme
  20 [2][tooltip:0->eee, 1->ihh, 2->ehh, 3->aaa, 4->ahh, 5->aww, 6->ohh, 7->uhh, 8->uuu, 9->ooo, 10->rrr, 11->lll, 12->mmm, 13->nnn, 14->nng, 15->ngg, 16->fff, 17->sss, 18->thh, 19->shh, 20->xxx, 21->hee, 22->hoo, 23->hah, 24->bbb, 25->ddd, 26->jjj, 27->ggg, 28->vvv, 29->zzz, 30->thz, 31->zhh]",4,0,31,1);
  21
  22 vibratoFreq = hslider("h:Envelopes_and_Vibrato/v:Vibrato_Parameters/Vibrato_Freq
  23 [3][unit:Hz]",6,1,15,0.1);
  24 vibratoGain = hslider("h:Envelopes_and_Vibrato/v:Vibrato_Parameters/Vibrato_Gain
  25 [3][tooltip:A value between 0 and 1]",0.05,0,1,0.01);
  26 vibratoBegin = hslider("h:Envelopes_and_Vibrato/v:Vibrato_Parameters/Vibrato_Begin
  27 [3][unit:s][tooltip:Vibrato silence duration before attack]",0.05,0,2,0.01);
  28 vibratoAttack = hslider("h:Envelopes_and_Vibrato/v:Vibrato_Parameters/Vibrato_Attack
  29 [3][unit:s][tooltip:Vibrato attack duration]",0.5,0,2,0.01);
  30 vibratoRelease = hslider("h:Envelopes_and_Vibrato/v:Vibrato_Parameters/Vibrato_Release
  31 [3][unit:s][tooltip:Vibrato release duration]",0.1,0,2,0.01);
  32
  33 voicedEnvelopeAttack = hslider("h:Envelopes_and_Vibrato/v:Envelope_Parameters/Voiced_Attack
  34 [4][unit:s][tooltip:Voiced sounds attack duration]",0.01,0,2,0.01);
  35 voicedEnvelopeRelease = hslider("h:Envelopes_and_Vibrato/v:Envelope_Parameters/Voiced_Release
  36 [4][unit:s][tooltip:Voiced sounds release duration]",0.01,0,2,0.01);
  37
  38 noiseEnvelopeAttack = hslider("h:Envelopes_and_Vibrato/v:Envelope_Parameters/Noised_Attack
  39 [4][unit:s][tooltip:Noised sounds attack duration]",0.001,0,2,0.001);
  40 noiseEnvelopeRelease = hslider("h:Envelopes_and_Vibrato/v:Envelope_Parameters/Noised_Release
  41 [4][unit:s][tooltip:Noised sounds release duration]",0.001,0,2,0.001);
  42
  43 //==================== SIGNAL PROCESSING ================
  44
  45 //----------------------- Synthesis parameters computing and functions declaration ----------------------------
  46
  47 //stereoizer is declared in instrument.lib and implement a stereo spacialisation in function of
  48 //the frequency period in number of samples
  49 stereo = stereoizer(SR/freq);
  50
  51 //exitation filters (declared in instrument.lib)
  52 onePoleFilter = onePole(b0,a1)
  53         with{
  54                 pole = 0.97 - (gain*0.2);
  55                 b0 = 1 - pole;
  56                 a1 = -pole;
  57         };
  58 oneZeroFilter = oneZero1(b0,b1)
  59         with{
  60                 zero = -0.9;
  61                 b0 = 1/(1 - zero);
  62                 b1 = -zero*b0;
  63         };
  64
  65 //implements a formant (resonance) which can be "swept" over time from one frequency setting to another
  66 formSwep(frequency,radius,filterGain) = *(gain_) : bandPass(frequency_,radius)
  67         with{
  68                 //filter's radius, gain and frequency are interpolated
  69                 radius_ = radius : smooth(0.999);
  70                 frequency_ = frequency : smooth(0.999);
  71                 gain_ = filterGain : smooth(0.999);
  72         };
  73
  74 //formants parameters are countained in a C++ file
  75 phonemeGains = ffunction(float loadPhonemeGains(int,int), <phonemes.h>,"");
  76 phonemeParameters = ffunction(float loadPhonemeParameters(int,int,int), <phonemes.h>,"");
  77
  78 //formants frequencies
  79 ffreq0 = phonemeParameters(phoneme,0,0);
  80 ffreq1 = phonemeParameters(phoneme,1,0);
  81 ffreq2 = phonemeParameters(phoneme,2,0);
  82 ffreq3 = phonemeParameters(phoneme,3,0);
  83
  84 //formants radius
  85 frad0 = phonemeParameters(phoneme,0,1);
  86 frad1 = phonemeParameters(phoneme,1,1);
  87 frad2 = phonemeParameters(phoneme,2,1);
  88 frad3 = phonemeParameters(phoneme,3,1);
  89
  90 //formants gains
  91 fgain0 = phonemeParameters(phoneme,0,2) : pow(10,(_/20));
  92 fgain1 = phonemeParameters(phoneme,1,2) : pow(10,(_/20));
  93 fgain2 = phonemeParameters(phoneme,2,2) : pow(10,(_/20));
  94 fgain3 = phonemeParameters(phoneme,3,2) : pow(10,(_/20));
  95
  96 //gain of the voiced part od the sound
  97 voiceGain = phonemeGains(phoneme,0) : smooth(0.999);
  98
  99 //gain of the fricative part of the sound
 100 noiseGain = phonemeGains(phoneme,1) : smooth(0.999);
 101
 102 //formants filters
 103 filter0 = formSwep(ffreq0,frad0,fgain0);
 104 filter1 = formSwep(ffreq1,frad1,fgain1);
 105 filter2 = formSwep(ffreq2,frad2,fgain2);
 106 filter3 = formSwep(ffreq3,frad3,fgain3);
 107
 108 //----------------------- Algorithm implementation ----------------------------
 109
 110 //envelopes (declared in instrument.lib) and vibrato
 111 vibratoEnvelope = envVibrato(vibratoBegin,vibratoAttack,100,vibratoRelease,gate);
 112 voicedEnvelope = asr(voicedEnvelopeAttack,100,voicedEnvelopeRelease,gate);
 113 noiseEnvelope = asr(noiseEnvelopeAttack,100,noiseEnvelopeRelease,gate);
 114 vibrato = osc(vibratoFreq)*vibratoGain*100*vibratoEnvelope;
 115
 116 //the voice source is generated by an impulse train
 117 //(imptrain defined in oscillator.lib) that is lowpass filtered
 118 voiced = imptrain(freq+vibrato) : lowpass3e(3300) : *(voiceGain*voicedEnvelope);
 119
 120 //ficative sounds are produced by a noise generator
 121 frica = noise*noiseEnvelope*noiseGain;
 122
 123 process = voiced : oneZeroFilter : onePoleFilter :
 124                  +(frica) <: filter0,filter1,filter2,filter3 :> + : stereo :
 125                  instrReverb;
 126