https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-DIS/Part01/components/sound.html 
- web3d refers to webaudio
- we have a soundlib library that has the webaudio API in C++

WEBAUDIO
https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API  
https://www.w3.org/TR/webaudio/ 
- the base webaudio API
EXAMPLES in webaudio format
https://webaudioapi.com/samples/ 
https://googlechromelabs.github.io/web-audio-samples/ 
https://webaudiodemos.appspot.com/ 
- Playground has webaudio node routing


Difference betweeen web3d sound component and webaudio:
- webaudio all nodes are created by javascript class function from a master audiocontext node / object
- web3d sound has no explicit audiocontext - all nodes are created statically from an assumed / implied single audiocontext

SAMPLE SCENES
https://medialab.hmu.gr/minipages.html  
https://medialab.hmu.gr/minipages/x3domAudio/index.html 
- original Greek scene, x3dom override
https://www.x3dgraphics.com/examples/X3dForAdvancedModeling/AudioSpatialSound/index.html
- early 2022 web3d sample audio scenes 
- (constants should be web3d ALLCAPS if not)
AllAudioGraphNodesTest.x3d
Filters.x3d
InlineSoundSource.x3d
SingleAudio.x3d
SpatialAudioCameraAnimation.x3d
SplitChannels.x3d