Better default window function

Author: rochars

CHANGELOG.md

@@ -1,5 +1,8 @@
 # CHANGELOG
 
+## version 10.4.2 - 2020-01-22
+Better sinc resampling.
+
 ## version 10.4.1 - 2020-01-21
 Faster sinc resampling.
 

dist/wavefile.js

@@ -90,7 +90,7 @@ export class Interpolator {
      * The sinc kernel.
      * @type {Function}
      */
-    this.kernel_ = sincKernel_(details.sincWindow || gaussianWindow_);
+    this.kernel_ = sincKernel_(details.sincWindow || window_);
   }
 
   /**
@@ -187,8 +187,8 @@ export class Interpolator {
  * @return {number}
  * @private
  */
-function gaussianWindow_(x) {
-  return Math.exp(-x * x);
+function window_(x) {
+  return Math.exp(-x / 2 * x / 2);
 }
 
 /**

lib/resampler/interpolator.js

@@ -1,6 +1,6 @@
 {
   "name": "wavefile",
-  "version": "10.4.1",
+  "version": "10.4.2",
   "description": "Create, read and write wav files according to the specs.",
   "homepage": "https://github.com/rochars/wavefile",
   "author": "Rafael da Silva Rocha <[email protected]>",
@@ -73,7 +73,7 @@
     "test-sr-point": "node ./node_modules/mocha/bin/_mocha test/resampler-full/point.js -R dot --timeout=1600000",
     "test-sr-linear": "node ./node_modules/mocha/bin/_mocha test/resampler-full/linear.js -R dot --timeout=1600000",
     "test-sr-cubic": "node ./node_modules/mocha/bin/_mocha test/resampler-full/cubic.js -R dot --timeout=1600000",
-    "test-sr-sinc": "node ./node_modules/mocha/bin/_mocha test/resampler-full/sinc.js test/resampler-full/sinc-IIR.js -R dot --timeout=1600000",
+    "test-sr-sinc": "node ./node_modules/mocha/bin/_mocha test/resampler-full/sinc.js test/resampler-full/sinc-IIR.js test/resampler-full/sinc-no-lpf.js -R dot --timeout=1600000",
     "test-umd": "node ./node_modules/mocha/bin/_mocha test/resampler test/dist test/src --umd --recursive -R dot --timeout=240000",
     "test-tsc": "tsc ./test/TypeScript/index.ts && node -r esm ./test/TypeScript/index.js",
     "test-cli": "wavefile ./test/files/M1F1-int12WE-AFsp.wav --tag=ICMT",