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<style>
.note {
color: #339;
text-decoration: underline;
cursor: pointer;
}
* {
cursor: default;
}
.heading {
cursor: pointer;
}
.active {
font-weight: bold;
}
pre {
white-space: pre-line;
}
</style>
<script type="text/scale" id="meantone-scl">
! meanquar.scl
!
1/4-comma meantone scale. Pietro Aaron's temperament (1523)
12
!
76.04900
193.15686
310.26471
5/4
503.42157
579.47057
696.57843
25/16
889.73529
1006.84314
1082.89214
2/1
</script>
<script type="text/scale" id="twelveet-scl">
! 12et.scl
!
12-edo equal temperament (scl)
12
!
100.
200.
300.
400.
500.
600.
700.
800.
900.
1000.
1100.
1200.
</script>
<script type="text/scale" id="mavila12-scl">
! mavila12.scl
!
A 12-note mavila scale (for warping meantone-based music), 5-limit TOP
12
!
-30.99719
163.50770
358.01258
327.01540
521.52028
490.52310
685.02798
654.03080
848.53568
1043.04057
1012.04338
1206.54826
</script>
<script type="text/scale" id="carlos_alpha-scl">
! carlos_alpha.scl
!
Wendy Carlos' Alpha scale with perfect fifth divided in nine
18
!
78.00000
156.00000
234.00000
312.00000
390.00000
468.00000
546.00000
624.00000
702.00000
780.00000
858.00000
936.00000
1014.00000
1092.00000
1170.00000
1248.00000
1326.00000
1404.00000
</script>
<pre>
<script src="http://asdf.us/harp/js/vendor/Tone.min.js"></script>
<script src="intonation.js"></script>
<div id="scale_list"></div>
<script>
var opts = [
{
intervals: '1/1 9/8 5/4 4/3 3/2 5/3 15/8 2/1',
name: "harmonic scale",
},
{
root: 450,
intervals: '1/1 9/8 5/4 4/3 3/2 5/3 15/8 2/1',
name: "harmonic scale @ 450",
},
{
tet: 5,
},
{
tet: 12,
},
{
scl: document.querySelector("#twelveet-scl").innerHTML,
},
{
tet: 17,
},
{
intervals: '1/1 81/80 33/32 21/20 16/15 12/11 11/10 10/9 9/8 8/7 7/6 32/27 6/5 11/9 5/4 14/11 9/7 21/16 4/3 27/20 11/8 7/5 10/7 16/11 40/27 3/2 32/21 14/9 11/7 8/5 18/11 5/3 27/16 12/7 7/4 16/9 9/5 20/11 11/6 15/8 40/21 64/33 160/81 2/1',
name: "harry partch scale",
},
{
scl: document.querySelector("#meantone-scl").innerHTML,
},
{
scl: document.querySelector("#mavila12-scl").innerHTML,
},
{
scl: document.querySelector("#carlos_alpha-scl").innerHTML,
},
]
var scale
var scale_list = document.querySelector("#scale_list")
opts.forEach(function(opt){
var s = new Intonation(opt)
var heading = write( s.name )
var limit = s.interval == 2 ? s.scale.length : s.scale.length*2
write( "<span>" + s.range( 0, limit+1).map(function(i){ return i.toFixed(0) }).join("</span> <span>") + "</span>" )
write(" ")
if (! scale) {
scale = s
heading.classList.add("active")
console.log(s)
console.log("scale:", s.name)
}
heading.classList.add("heading")
heading.addEventListener("click", function(){
var active = document.querySelector(".active")
active && active.classList.remove("active")
scale = s
heading.classList.add("active")
console.log(s)
console.log("scale:", s.name)
})
})
var polysynth = new Tone.PolySynth(8, Tone.synth)
polysynth.set({
oscillator: { type: "sine" },
envelope:{
attack: 0.01,
decay: 2.5,
sustain: 0.0,
release: 0.1,
}
})
var comp = new Tone.Compressor(-30, 3).toMaster()
polysynth.connect(comp)
Array.prototype.slice.apply( document.querySelectorAll("span") ).forEach(function(span){
if (! span.innerHTML.match(/[^0-9]/)) {
var freq = parseInt(span.innerHTML)
span.classList.add("note")
span.addEventListener("click", function(){
play(freq)
})
}
})
var keys
var keys = {}
var key_numbers = {}
var letters = "zxcvbnmasdfghjklqwertyuiop"
var numbers = "1234567890";
letters.toUpperCase().split("").map(function(k,i){
keys[k.charCodeAt(0)] = i
})
numbers.split("").map(function(k,i){
keys[k.charCodeAt(0)] = true
key_numbers[k.charCodeAt(0)] = true
})
window.addEventListener("keydown", keydown, true)
function keydown (e){
if (e.altKey || e.ctrlKey || e.metaKey) {
e.stopPropagation()
return
}
if (! (e.keyCode in keys)) return
var index = keys[e.keyCode]
if (e.shiftKey) index += letters.length
var freq = scale.index(index)
play(freq)
}
function write(s){
var div = document.createElement("div")
div.innerHTML = s
scale_list.appendChild(div)
return div
}
function play (freq) {
console.log(freq.toFixed(0))
polysynth.triggerAttackRelease(freq, 1.5)
}
</script>
|
