variables.js

// Track jumper
var jump_pos = 0;
var jump_ccs = [62,58,54,50,30,26,22,18];
var que_jump = 0;

// MIDIRen Screens
var track_ccs = [
  [44,40,36,32,12,8,4,0],
  [45,41,37,33,13,9,5,1],
  [46,42,38,34,14,10,6,2],
  [47,43,39,35,15,11,7,3],
  [60,56,52,48,28,24,20,16],
  [61,57,53,49,29,25,21,17]
];

var mrs = [];

for(var i = 0; i < 8; i++) {

  mrs[i] = [];
  for(var j = 0; j < track_ccs.length; j++) {
    for(var k = 0; k < track_ccs[j].length; k++) {
      mrs[i][track_ccs[j][k]] = 0;
    }
  }
}

var mr_velocity_sn = 0;
var mr_pattern_sn = 1;
var mr_note_ran_sn = 2;
var mr_root_note_sn = 3;
var mr_chord_prog_sn = 4;
var mr_bpm_sn = 5;
var mr_preset_sn = 6;
var mr_drum_pad_sn = 7;

var mr_current_sn = 0;
var mr_current_msec = 0;

var presets = [
  {
    'track_velocity' : [127,127,30,15,127,127],
    'track_pattern' : [0,0,0,0,0,0],
    'track_note_ran' : [0,0,0,0,0,0],
    'root_note' : 48,
    'chord_prog' : 5,
    'bpm' : 120,
    'patterns' : {
      't1_bd' : [
        'x---x---x---x---',
        'x--x---x-x-x----',
        'x--x--x--x--x-x-',
        'x------x-x------',
        'x---x--x--x-----',
        'x--x--x-----x---',
        'x---x----x--x---',
        'x----x--x----x--'
      ],
      't1_sn' : [
        '----x-------x---',
        '----x-------x---',
        '----x--x--x-----',
        '---x--------x---',
        '----x---x---x---',
        '----x--x---x----',
        '-----x-------x--',
        '----x---x-------'
      ],
      't2' : [
        '---o--cc-o-o----',
        '---p-p-----p-p--',
        '--p-----y--p-p-p',
        '--------hhhhllll',
        'c-c-c-c-c-c-c-c-',
        '--o--coc--o--o-o',
        'c---c---c---c---',
        '--hh--l---h--l-l',
      ],
      't3' : [
        'x==>-xxxx==>-xxx',
        'x--xx--xxxxx-xxx',
        'x>-xx>-xx>-xx>-x',
        'x==>-x=>x==>-x=>',
        '--xxx>-xx>-xx>--',
        'xxxx----xxxx----',
        'x-x-x-x-x-x-x-x-',
        'xx--xx--xx--xx--'
      ],
      't4' : [
        'x==>-xxxx==>-xxx',
        'x--xx--xxxxx-xxx',
        'x>-xx>-xx>-xx>-x',
        'x==>-x=>x==>-x=>',
        '--xxx>-xx>-xx>--',
        'xxxx----xxxx----',
        'x-x-x-x-x-x-x-x-',
        'xx--xx--xx--xx--'
      ],
      't5' : [
        'x==>-xxxx==>-xxx',
        'x--xx--xxxxx-xxx',
        'x>-xx>-xx>-xx>-x',
        'x==>-x=>x==>-x=>',
        '--xxx>-xx>-xx>--',
        'xxxx----xxxx----',
        'x-x-x-x-x-x-x-x-',
        'xx--xx--xx--xx--'
      ],
      't6' : [
        'x==>-xxxx==>-xxx',
        'x--xx--xxxxx-xxx',
        'x>-xx>-xx>-xx>-x',
        'x==>-x=>x==>-x=>',
        '--xxx>-xx>-xx>--',
        'xxxx----xxxx----',
        'x-x-x-x-x-x-x-x-',
        'xx--xx--xx--xx--'
      ]
    },
    'notes' : {
      't3' : [
        '1111111111111111',
        '111r111r111r111r',
        '1124117111rr1111',
        '1113311113161711',
        '5115113112115181',
        '11rr11rr11rr11rr',
        '1r1r1r1r1r1r1r1r',
        'rrrrrrrrrrrrrrrr'
      ],
      't4' : [
        '1111322241113232',
        '2233344455422334',
        '6655655333444466',
        '7776666rr6377r88',
        '2377777662rr16rr',
        '9997888677756664',
        '1113222433354446',
        'rrrrrrrrrrrrrrrr'
      ],
      't5' : [
        '1123112346546542',
        '6767545565234354',
        '8985887767877566',
        '564r564r5687rr35',
        '11rr44rr11rr44rr',
        '9876543219876543',
        '1234566789123456',
        'rrrrrrrrrrrrrrrr'
      ],
      't6' : [
        '1234123412341234',
        '1234561234561234',
        '9876987698769876',
        '7654765476547654',
        '7654327654327654',
        '7733773388266444',
        '1r1r1r1r1r1r1r1r',
        'rrrrrrrrrrrrrrrr'
      ]
    }
  }
];

var selected_preset = 0;

// Patterns
var p_t1_bd = [
  'x---x---x---x---',
  'x--x---x-x-x----',
  'x--x--x--x--x-x-',
  'x------x-x------',
  'x---x--x--x-----',
  'x--x--x-----x---',
  'x---x----x--x---',
  'x----x--x----x--'
];
var p_t1_sn = [
  '----x-------x---',
  '----x-------x---',
  '----x--x--x-----',
  '---x--------x---',
  '----x---x---x---',
  '----x--x---x----',
  '-----x-------x--',
  '----x---x-------'
];
var p_t2 = [
  '---o--cc-o-o----',
  '---p-p-----p-p--',
  '--p-----y--p-p-p',
  '--------hhhhllll',
  'c-c-c-c-c-c-c-c-',
  '--o--coc--o--o-o',
  'c---c---c---c---',
  '--hh--l---h--l-l',
];
var p_t2_letter_to_notenum = {
  '-' : 0,
  'o' : 56,
  'c' : 55,
  'p' : 40,
  'y' : 54,
  'h' : 72,
  'l' : 71
};
// Key:
// o -> Open Hi Hat
// c -> Closed Hi Hat
// p -> Clap
// y -> Cymbol
// h -> High Tom
// l -> Low Tom

var p_t3 = [
  'x==>-xxxx==>-xxx',
  'x--xx--xxxxx-xxx',
  'x>-xx>-xx>-xx>-x',
  'x==>-x=>x==>-x=>',
  '--xxx>-xx>-xx>--',
  'xxxx----xxxx----',
  'x-x-x-x-x-x-x-x-',
  'xx--xx--xx--xx--'
];
var p_t4 = [
  'x==>-xxxx==>-xxx',
  'x--xx--xxxxx-xxx',
  'x>-xx>-xx>-xx>-x',
  'x==>-x=>x==>-x=>',
  '--xxx>-xx>-xx>--',
  'xxxx----xxxx----',
  'x-x-x-x-x-x-x-x-',
  'xx--xx--xx--xx--'
];
var p_t5 = [
  'x==>-xxxx==>-xxx',
  'x--xx--xxxxx-xxx',
  'x>-xx>-xx>-xx>-x',
  'x==>-x=>x==>-x=>',
  '--xxx>-xx>-xx>--',
  'xxxx----xxxx----',
  'x-x-x-x-x-x-x-x-',
  'xx--xx--xx--xx--'
];
var p_t6 = [
  'x==>-xxxx==>-xxx',
  'x--xx--xxxxx-xxx',
  'x>-xx>-xx>-xx>-x',
  'x==>-x=>x==>-x=>',
  '--xxx>-xx>-xx>--',
  'xxxx----xxxx----',
  'x-x-x-x-x-x-x-x-',
  'xx--xx--xx--xx--'
];

var p_t3_n = [
  '1111111111111111',
  '111r111r111r111r',
  '1124117111rr1111',
  '1113311113161711',
  '5115113112115181',
  '11rr11rr11rr11rr',
  '1r1r1r1r1r1r1r1r',
  'rrrrrrrrrrrrrrrr'
];
var p_t4_n = [
  '1111322241113232',
  '2233344455422334',
  '6655655333444466',
  '7776666rr6377r88',
  '2377777662rr16rr',
  '9997888677756664',
  '1113222433354446',
  'rrrrrrrrrrrrrrrr'
];
var p_t5_n = [
  '1123112346546542',
  '6767545565234354',
  '8985887767877566',
  '564r564r5687rr35',
  '11rr44rr11rr44rr',
  '9876543219876543',
  '1234566789123456',
  'rrrrrrrrrrrrrrrr'
];
var p_t6_n = [
  '1234123412341234',
  '1234561234561234',
  '9876987698769876',
  '7654765476547654',
  '7654327654327654',
  '7733773388266444',
  '1r1r1r1r1r1r1r1r',
  'rrrrrrrrrrrrrrrr'
];

// Key:
// numbers: Relative notes in a chord
// r: Random note in chord

var chord_notes = {
  'i'    :[0,3,7],
  'I'    :[0,4,7],
  'ii'   :[0,3,7],
  'ii_d' :[0,3,6],
  'III'  :[0,4,7],
  'iii'  :[0,3,7],
  'iv'   :[0,3,7],
  'IV'   :[0,4,7],
  'V'    :[0,4,7],
  'VI'   :[0,4,7],
  'vi'   :[0,3,7],
  'bVII' :[0,4,7],
  'vii_d':[0,3,6]
};
var chord_positions = {
  'i'    : 0,
  'I'    : 0,
  'ii'   : 2,
  'ii_d' : 2,
  'III'  : 3,
  'iii'  : 4,
  'iv'   : 5,
  'IV'   : 5,
  'V'    : 7,
  'VI'   : 8,
  'vi'   : 9,
  'bVII' :10,
  'vii_d':11
};

var chord_progressions = [
  ['I','ii','I','IV'],
  ['I','ii','I','vii_d','I','IV'],
  ['I','vii_d','V','vii_d','I','V'],
  ['I','vi','ii','V'],
  ['I','iii','ii'],
  ['I','V'],

  ['I','IV','vii_d'],
  ['I','IV','V','vii_d','V','vii_d','V'],
  ['I','iii','vi','ii'],
  ['I','iii','iii','vi','vi','ii','ii'],
  ['I','I','ii','ii','I','I','IV','IV'],
  ['I','I','ii','ii','I','I','vii_d','vii_d','I','I','IV','IV'],

  ['I','I','vii_d','vii_d','V','V','vii_d','vii_d','I','I','V','V'],
  ['I','I','vi','vi','ii','ii','V','V'],
  ['I','I','iii','iii','ii','ii'],
  ['I','I','V','V'],
  ['I','I','IV','IV','vii_d','vii_d'],
  ['I','I','iii','iii','vi',,'vi','ii','ii'],

  ['i','ii_d','vii_d','V','vii_d'],
  ['i','iv','vii_d','VI','ii_d'],
  ['i','bVII','iv','i','VI','ii_d','vii_d'],
  ['i','vii_d','V','i','V','VI','ii_d'],
  ['i','ii_d','V'],
  ['i','VI','ii_d','i','vii_d'],

  ['i','ii_d','vii_d','V'],
  ['i','V','vii_d','V'],
  ['i','ii_d','i','V'],
  ['i','i','ii_d','ii_d','vii_d','vii_d','V','V','vii_d','vii_d'],
  ['i','i','iv','iv','vii_d','vii_d','VI','VI','ii_d','ii_d'],
  ['i','i','bVII','bVII','iv','iv','i','i','VI','VI','ii_d','ii_d','vii_d','vii_d'],

  ['i','i','vii_d','vii_d','V','V','i','i','V','V','VI','VI','ii_d','ii_d'],
  ['i','i','ii_d','ii_d','V','V'],
  ['i','i','VI','VI','ii_d','ii_d','i','i','vii_d','vii_d'],
  ['i','i','ii_d','ii_d','vii_d','vii_d','V','V'],
  ['bVII'],
  ['vii_d'],

  ['I'],
  ['ii'],
  ['iii'],
  ['IV'],
  ['V'],
  ['vi'],

  ['i'],
  ['ii_d'],
  ['III'],
  ['iv'],
  ['V'],
  ['VI']
];
// Progressions generated via:
// http://www.rowlandrose.com/experiments/chord_progression_experiment/

var current_pattern_t1 = 0;
var current_pattern_t2 = 0;
var current_pattern_t3 = 0;
var current_pattern_t4 = 0;
var current_pattern_t5 = 0;
var current_pattern_t6 = 0;

var selected_pattern_t1 = 0;
var selected_pattern_t2 = 0;
var selected_pattern_t3 = 0;
var selected_pattern_t4 = 0;
var selected_pattern_t5 = 0;
var selected_pattern_t6 = 0;

var que_pattern_t1 = 0;
var que_pattern_t2 = 0;
var que_pattern_t3 = 0;
var que_pattern_t4 = 0;
var que_pattern_t5 = 0;
var que_pattern_t6 = 0;

var current_rand_t1 = 0;
var current_rand_t2 = 0;

var current_note_t3 = 0;
var current_note_t4 = 0;
var current_note_t5 = 0;
var current_note_t6 = 0;

var que_note_t3 = 0;
var que_note_t4 = 0;
var que_note_t5 = 0;
var que_note_t6 = 0;

var current_t3_num = current_pattern_t3;
var current_t4_num = current_pattern_t4;
var current_t5_num = current_pattern_t5;
var current_t6_num = current_pattern_t6;

var prev_played_num_t3 = current_pattern_t3;
var prev_played_num_t4 = current_pattern_t4;
var prev_played_num_t5 = current_pattern_t5;
var prev_played_num_t6 = current_pattern_t6;

var prev_t3_p = 0;
var prev_t4_p = 0;
var prev_t5_p = 0;
var prev_t6_p = 0;

var prev_velocity = [0,0,0,0,0,0];

// Constants
var MIDIREN_CH = 16;
var BEATS_PER_MEASURE = 4;
var PPQ = 4; // Pulse Per Quarter-note (beat), 4 = sixteenth notes
var CLOCK_PPQ = 24; // PPQ of incoming MIDI timing clock messages
var CLOCK_PER_CLICK = Math.floor(CLOCK_PPQ / PPQ);
var NOTE_OFFSET = -12; // Notes away from chosen root note

var UX16_midi_port = 1; // midi port UX16
var MIDIRen_midi_port = 2; // midi port MIDIRen

var bpm_tap_arr = [];
var bpm_tap_prev_time = 0;

var midi = require('midi'); // Include midi library

var midiren_play = false;

var ext_bpm = false;
var bpm_clock = 24;
var current_clock = CLOCK_PER_CLICK;
var current_pulse = 0;
var prog_spot = 0;
var current_chord = 0;
var current_root = 0;