forked from: 音声合成もどき
// forked from wanson's 音声合成もどき
package {
import flash.display.*;
import flash.events.*;
import flash.media.*;
public class Voice extends Sprite {
private var phase:Number = 0, time:Number = 0;
private var tap:Array = [0., 0., 0., 0., 0., 0., 0., 0., 0., 0.];
private const FL:Array = [
[800., 1300., 2500., 3500., 4500., 0.9],
[250., 2100., 3100., 3500., 4500., 1.3],
[250., 1400., 2200., 3500., 4500., 1.2],
[450., 1900., 2400., 3500., 4500., 0.9],
[450., 900., 2600., 3500., 4500., 0.8]];
private var notes:Array = [
15, 17, 19, 20, 19, 17, 15, 0, 19, 20, 22, 24, 22, 20, 19, 0,
15, 0, 15, 0, 15, 0, 15, 0, 15, 17, 19, 20, 19, 17, 15, 0,
];
private var n:int = 0;
private var prevFreq:Number = 0;
private var freq:Number = 440;
private var count:int = 0;
private const speed:Number = 4 / 1.5;
private const portament:Number = 1000;
private var vow1:int = 0;
private var vow2:int = 1;
private var prevTiming:Number = 0;
public function Voice() {
var sound:Sound = new Sound();
sound.addEventListener(SampleDataEvent.SAMPLE_DATA, function(event:SampleDataEvent):void {
for (var i:int = 0; i < 8192; i++, phase += freq / 44100, time += 1. / 44100.) {
const nn:int = notes[Math.floor((time + 0.5)* speed) % notes.length];
const timing:Number = time * speed;
if (nn != 0) n = nn;
const nextFreq:Number = (55 << (n / 12)) * Math.pow(2, (n % 12) / 12);
if (Math.floor(prevTiming) - Math.floor(timing) < 0) {
vow1 = count % 5;
if (prevFreq != nextFreq)
count++;
vow2 = count % 5;
prevTiming = timing;
prevFreq = nextFreq;
}
const amp:Number = (.65 - .15 * Math.cos(Math.PI * timing));
const w:Number = 1 / (1 + Math.exp(-30 * (timing - Math.floor(timing) - .5)));
var s:Number = .4 * Math.sin(phase - Math.floor(phase))
* ((1 - w) * FL[vow1][5] + w * FL[vow1][5]) * amp;
freq += (nextFreq - freq) / portament;
for (var k:int = 0; k < 5; k++) {
const ff:Number = (1 - w) * FL[vow1][k] + w * FL[vow2][k];
const r:Number = Math.exp(-Math.PI * 50. * (1. + ff * ff * 1e-6 / 6.) / 44100.);
const a1:Number = 2. * r * Math.cos(2.0 * Math.PI * ff / 44100.);
s = (1. - a1 + r * r) * s + (a1 * tap[k]) - (r * r * tap[k + 5]);
tap[k + 5] = tap[k]; tap[k] = s;
}
event.data.writeFloat(s); event.data.writeFloat(s);
}
});
sound.play();
}
}}