song.json

/**
 * Subdivision values are calculated by determining the number
 * of that subdivision in a 4/4 measure.
 * 4 = quarter notes--4 quarter notes in a 4/4 measure.
 * 12 = triplet 8th notes - 12 triplet 8th notes in a 4/4 measure.
 * 20 = quintuplet 16th notes - 20 quintuplet 16th notes in a 4/4 measure--4 per beat.
 * 3 = triplet half notes.
 * 7 = group of 7. This can be displayed as 8th notes or quarter notes. sometimes, 
 *      you'll see 7:4 which means there's 7 in the span of 4, in which case, 
 *      they'd be quarter notes. if 8th notes, it'd have 7:8 written above.
 */

{
    "id" : 111,
    "artist" : "song artist",
    "title" : "song title",
    "tabType" : "guitar, ukulele, bass",
    "capoFret" : 0,
    "strings" : [
    {
        "id" : 222,
        "songId" : 111,
        "hz" : 440.0,
        "note" : "A", //Ab, A#.
        "octave" : 5,
        "type" : "Steel" //nylon, etc.
    }
    ],
    "measures" : [
    {
        "id" : 333,
        "songId" : 111,
        "measureNumber" : 1,
        "tempoSubdivision" : 4,         //This, along with the following 3, would be null for any measure that doesn't change them.
        "subdivisionPerMinute" : 120,   //in conjunction with tempoSubdivision, this means 120 quarter notes / minute
        "timeSubdivision" : 4,          //the bottom number of the time signature
        "subdivisionPerMeasure" : 4,    // in conjunction with timeSubdivision, this means 4/4.
        "notes" : [
        {
            "string" : 0,          //indicates which string in the song's "strings" array to play on.
            "subdivision" : 8,          //subdivision of the starting point of the note.
            "position" : 3,             //0-indexed, this means the note starts no the 4th 8th note of the measure--the and of 2.
            "absolutePosition" : 1.5,   //also 0-indexed. This is the beat (according to the measure.timeSubdivision) at which the note should start. 
                                        //This is calculated by position / subdivision * measure.timeSubdivision.
            "length" : 1,               //length in subdivisions.
            "fret" : 2,
            "tieStart" : false,         //the previous note is tied into this one--as in from another measure (maybe?), or when changing subdivision.
            "tieEnd" : false,
            "hammerOn" : false,
            "pullOff" : false,
            "mute" : false
        }
        ]
    }
    ]
}