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fix gain introduced by filtering

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This commit is contained in:
Jakob Ketterl 2020-01-09 21:44:36 +01:00
parent 98e227c102
commit 922a5ed607
1 changed files with 3 additions and 1 deletions
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4
htdocs/lib/AudioEngine.js
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@ -294,6 +294,7 @@ Interpolator.prototype.process = function(data) {
}; };
function Lowpass(interpolation) { function Lowpass(interpolation) {
this.interpolation = interpolation;
var transitionBandwidth = 0.05; var transitionBandwidth = 0.05;
this.numtaps = Math.round(4 / transitionBandwidth); this.numtaps = Math.round(4 / transitionBandwidth);
if (this.numtaps % 2 == 0) this.numtaps += 1; if (this.numtaps % 2 == 0) this.numtaps += 1;
@ -348,7 +349,8 @@ Lowpass.prototype.process = function(input) {
acc += this.delay[index] * this.coefficients[i]; acc += this.delay[index] * this.coefficients[i];
if (isNaN(acc)) debugger; if (isNaN(acc)) debugger;
} }
output[oi] = acc; // gain by interpolation
output[oi] = this.interpolation * acc;
} }
return output; return output;
}; };