scratchfoundation/scratch-audio
1
0
Fork 0
mirror of https://github.com/scratchfoundation/scratch-audio.git synced 2024-12-22 14:02:29 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

set DECAY_TIME to 25ms

Browse source 
Use a DECAY_TIME that envelopes half of the lowest frequency a person
can hear.
This commit is contained in:
Michael "Z" Goddard 2018-06-11 15:23:12 -04:00
parent 0059ff53e1
commit 87f400b27d
No known key found for this signature in database
GPG key ID: 762CD40DD5349872
1 changed files with 11 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
src/AudioEngine.js
View file

@ -77,13 +77,20 @@ class AudioEngine {
} }
/** /**
* A short duration, for use as a time constant for exponential audio parameter transitions. * A short duration to transition audio prarameters.
* See: *
* https://developer.mozilla.org/en-US/docs/Web/API/AudioParam/setTargetAtTime * Used as a time constant for exponential transitions. A general value
* must be large enough that it does not cute off lower frequency, or bass,
* sounds. Human hearing lower limit is ~20Hz making a safe value 25
* milliseconds or 0.025 seconds, where half of a 20Hz wave will play along
* with the DECAY. Higher frequencies will play multiple waves during the
* same amount of time and avoid clipping.
*
* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/AudioParam/setTargetAtTime}
* @const {number} * @const {number}
*/ */
get DECAY_TIME () { get DECAY_TIME () {
return 0.001; return 0.025;
} }
/** /**