[x3d-public] X3D agenda 1 May 2020: X3D4 Audio and Sound Component

[GPU Group]

> d.       Are all the “Effects” really the list of filters in which case
we may need an X3DAudioFilterNode
> e.       We need to discuss the hierarchy of Audio nodes
e.2 and how filter / audioNode chaining will work syntactically:
https://googlechrome.github.io/samples/webaudio-method-chaining/
js syntax:

ourceNode.connect(gainNode).connect(filterNode).connect(context.destination);

x3d declarative syntax:

????


-Doug Sanden

Would adding a connect/destination SFNode or MFNode field to abstract
AudioNode work? Or something about the DEF or id:

<AudioContext>
<AudioDestinationNode DEF='ADN1' />
<FilterNode DEF='FN1' connect='ADN1' />
<GainNode DEF='G1' connect='FN1' />
<sourceNode DEF='SN' connect='G1' />
</AudioContext>





On Thu, Apr 30, 2020 at 1:30 PM Don Brutzman <brutzman at nps.edu> wrote:

> Friday 1 May 2020, 0800-0930 pacific, X3D Working Group continues its
> regular weekly efforts on building X3D4 specification.
>
> Feedback on Mantis issues remains welcome. Dick and I continue to make
> progress with 6 more editorial changes resolved this week.
>
> * Mantis: View Issues
>    https://www.web3d.org/member-only/mantis/view_all_bug_page.php
>
> This week we are continuing development efforts on Audio and Sound
> Component contributions by Efi Lakka and Thanos Malamos.  Efi's recent
> modifications to PR9 for shape.html and sound.html have been integrated
> online in github.  For members:
>
> *
> https://github.com/Web3DConsortium/X3D/tree/master/ISO-IEC19775/ISO-IEC19775-1/ISO-IEC19775-1v4.0/ISO-IEC19775-1v4-WD1/Part01/components
>
> * Mantis 1267: Strategies to Improve X3Dv4 Audio and Sound Component
>    https://www.web3d.org/member-only/mantis/view.php?id=1267
>
> Slides from last meeting now attached at
>
> * X3D4 Implementations
>    https://www.web3d.org/x3dv4-implementations
>    X3dSoundPresentationSynopsis_CallMeeting17_04_2020.pdf
>
> Important addition: acoustic properties have been proposed for Shape
> component.  For a variety of reasons, we think that the relevant fields are
> better added as an AcousticProperties node, rather than further individual
> fields under Material.  This would appear as under Appearance as an
> acousticProperties field (similar to how LineProperties, PointProperties
> and TextureProperties are handled).
>
> AcousticProperties seems like the correct name for this node (rather than
> SoundProperties) because of it's relationship to geometry in a world,
> rather than sound generation per se.
>
> * Wiktionary: Acoustics
>    https://en.wiktionary.org/wiki/acoustics
>    "1. The physical quality of a space for conveying sound."
>
> Dick and I had the following questions to pose during the meeting.
>
> a.       Merge of AudioNode with X3DSoundSourceNode, or rename as
> X3DAudioNode?
> b.       Change name of AudioParam to AudioParameters
> c.       Please add revision date to first page of slide sets
> d.       Are all the “Effects” really the list of filters in which case we
> may need an X3DAudioFilterNode
> e.       We need to discuss the hierarchy of Audio nodes
> f.       Please add numbers to the slides
> g.       Current architecture disallows inheriting a node interface from a
> concrete node so we may need an X3DAudioContextNode abstract node type and
> concrete nodes to flesh it out.
> h.       Latency hint string or double precision decision, or both?
> i.       AudioNode inherits from a concrete node type (see g above)
>
> Also needed:
> - link to example models for demonstration and comparison with evolving
> specification interfaces.
> - start list of feedback comments for W3C Audio working group.
>
> ==================================
>
> Zoom room coordinates are now linked via the Web3D Calendar.
>
> * https://www.web3d.org/calendar/month
>
> *
> https://www.web3d.org/calendar/x3d-graphics-working-group/2019-09-13t150000-2019-09-13t163000-2019-09-20t150000-2019-09
>
> Thanks for all inputs and attendance.
>
> all the best, Don
> --
> Don Brutzman  Naval Postgraduate School, Code USW/Br
> brutzman at nps.edu
> Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA   +1.831.656.2149
> X3D graphics, virtual worlds, navy robotics
> http://faculty.nps.edu/brutzman
>
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