ChucK/foo.ck

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// Boolean_Quartet.ck // copyright 2007 Les Hall // This software released under the GNU General Protective License // experiments with creating music from base n sequences // four instruments in Boolean logic sequence

// control variables 150 => float frequency; 0.25 => float gain1; // SinOsc 0.25 => float gain2; // HF plucked 0.25 => float gain3; // LF plucked 0.15 => float gain4; // guitar 2 => int n; // numeric base of the sequence

// gain of each instrument Gain g1; Gain g2; Gain g3; Gain g4; gain1 => g1.gain; // binary count SinOsc's gain2 => g2.gain; // high frequency plucked instrument gain3 => g3.gain; // low frequency plucked instrument gain4 => g4.gain; // screaming guitar instrument

// the background oscillators SinOsc s[5]; for (0 => int i; i<5; i++) {

   // the patches
   s[i] => g1 => dac;
   // the frequencies
   (5 - i) * frequency => s[i].freq;

}

// The plucked treble instrument Impulse i1; JCRev r1; r1.mix(0.02); BPF f[5]; i1 => f[0] => r1 => g2 => dac; i1 => f[1] => r1 => g2 => dac; i1 => f[2] => r1 => g2 => dac; i1 => f[3] => r1 => g2 => dac; i1 => f[4] => r1 => g2 => dac; for (0 => int i; i < 5; i++) {

   // the patches
   //i1 => BPF f[i] => r1 => dac;
   // the quality factors
   100 => f[i].Q;
   // the frequencies
   (i + 1) * frequency => f[i].freq;

} // the gains 0.5 => f[0].gain; 1.0 => f[1].gain; 0.5 => f[2].gain; 0.5 => f[3].gain; 0.4 => f[4].gain;

// the plucked bass instrument Impulse i2; JCRev r2; r2.mix(0.05); BPF fb[5]; // the patches i2 => fb[0] => r2 => g3 => dac; i2 => fb[1] => r2 => g3 => dac; i2 => fb[2] => r2 => g3 => dac; i2 => fb[3] => r2 => g3 => dac; i2 => fb[4] => r2 => g3 => dac; for (0 => int i; i < 5; i++) {

   // the quality factors
   200 => fb[i].Q;
   // the frequencies
   (i + 1) * frequency => f[i].freq;
   // the gains
   2.0 / (i + 1) => f[i].gain;

}

// the screaming guitar instrument SinOsc sg[5]; JCRev rg; 0.20 => rg.mix; for (0 => int i; i<5; i++) {

   // the patches
   sg[i] => rg => g4 => dac;
   // the frequencies
   (i + 1) * frequency => sg[i].freq;

} // the gains 1.0 => sg[0].gain; 0.8 => sg[1].gain; 0.6 => sg[2].gain; 0.4 => sg[3].gain; 0.2 => sg[4].gain;

// time loop while (true) {

   // print the base for each sequence
   <<< "base", n >>>;

   // calculate the logic threshold
   (n-1) / 2.0 => float t;

   // loop in a 5-bit binary sequence and pluck the strings
   for (0 => int j1; j1 < n; j1++) {
       j1 / 16.0 / (n-1) => s[0].gain;
       for (0 => int j2; j2 < n; j2++) {
           j2 / 8.0 / (n-1) => s[1].gain;
           for (0 => int j3; j3 < n; j3++) {
               j3 / 4.0 / (n-1) => s[2].gain;
               for (0 => int j4; j4 < n; j4++) {
                   j4 / 2.0 / (n-1) => s[3].gain;
                   if (j4 > t) {
                       // the low frequency plucked instrument
                       (1.5 * (2 * (n - 1) + j3) / (3 *(n - 1))) * frequency => float freq;
                       for (0 => int i; i < 5; i++) {
                           (i + 1) * freq => fb[i].freq;
                       }
                       1000.0 => i2.next;
                   }
                   for (0 => int j5; j5 < n; j5++) {
                       j5 / 1.0 / (n-1) => s[4].gain;
                       // the high frequency plucked instrument
                       if ((j2 > t) && (j4 > t) || (j5 > t) && (j3 > t)) {
                           (2 * (j1 + j2 + j3 + j4 + j5) / (5 * (n - 1))) * frequency => float f

req;

                           for (0 => int i; i < 5; i++) {
                               (i + 1) * freq => f[i].freq;
                           }
                           300.0 => i1.next;
                       }
                       // the screaming guitar
                       if ((j3 > t) && (j4 > t)) {
                           (0.5 * ((j1 > t) + (j2 > t) + (j3 > t) + (j4 > t) + (j5 > t))) * freq

uency => float freq;

                           for (0 => int i; i<5; i++) {
                               (i + 1) * freq => sg[i].freq;
                           }
                       }
                       (n - j5) / (n $ float) * gain4 => g4.gain;
                       100::ms => now; // advance time
                   }
               }
           }
       }
   }

   // shut off the oscillators
   for (0 => int i; i < 5; i++) {
       0 => s[i].gain;
   }
   0 => g4.gain;

   // increment the base number
   n++;

   // advance time between binary counts
   <<< "pause" >>>;
   3::second => now;

}