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range test when setting rolloff

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This commit is contained in:
Yotam Mann 2014-09-06 15:36:10 -04:00
parent 35bc3f410b
commit 46a567c7f0
1 changed files with 7 additions and 5 deletions
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12
Tone/component/Filter.js
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@ -90,8 +90,8 @@ define(["Tone/core/Tone", "Tone/signal/Signal"], function(Tone){
*/
Tone.Filter.prototype.setType = function(type){
this._type = type;
for (var i = 0; i < this._filters.lenght; i++){
this._filter[i].type = type;
for (var i = 0; i < this._filters.length; i++){
this._filters[i].type = type;
}
};
@ -111,15 +111,17 @@ define(["Tone/core/Tone", "Tone/signal/Signal"], function(Tone){
* -12, -24, and -48.
*/
Tone.Filter.prototype.setRolloff = function(rolloff){
var cascadingCount = Math.log(rolloff / -12) / Math.LN2 + 1;
//check the rolloff is valid
if (cascadingCount % 1 !== 0){
throw new RangeError("Filter rolloff can only be -12, -24, or -48");
}
//first disconnect the filters and throw them away
this.input.disconnect();
for (var i = 0; i < this._filters.length; i++) {
this._filters[i].disconnect();
this._filters[i] = null;
}
this._filters = null;
//make new filters
var cascadingCount = rolloff / -12;
this._filters = new Array(cascadingCount);
for (var count = 0; count < cascadingCount; count++){
var filter = this.context.createBiquadFilter();