How to use the music-gamut.split function in music-gamut
To help you get started, we’ve selected a few music-gamut examples, based on popular ways it is used in public projects.
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tonaljs / tonal / packages / music-scale / lib / select.js View on Github 
return G.operation(function (g) {
var nums = G.split(pttn).map(function (n) { return +n - 1 })
var index = []
build(g, false).forEach(function (item) {
var fifths = (item[0] + 1) % 7
index[STEPS[fifths]] = item
})
var selected = nums.map(function (n) {
var i = index[n % 7]
// up an octave if number > 7
if (i && n > 6) {
i = i.slice()
i[1] = i[1] + Math.floor(n / 7)
}
return i
})
return selected.map(transpose(g[0]))
})function notesFilter (notes) {
var fns = gamut.split(notes).map(parse).map(noteFilter)
var len = fns.length
return function (note) {
for (var i = 0; i < len; i++) {
if (fns[i](note)) return true
}
return false
}
}filter.midi = function (fn, midi) {
if (arguments.length === 1) return function (m) { return filter.midi(fn, m) }
fn = filterFn(fn)
var midiNotes = gamut.split(midi).map(note)
return gamut.reduce(function (notes, n) {
if (fn(n)) notes.push(n)
else if (fn(prevEnh(n))) notes.push(prevEnh(n))
else if (fn(nextEnh(n))) notes.push(nextEnh(n))
return notes
}, [], midiNotes)
}
