[Sursound] Songbird

[Martin Leese]

Hi,

Google's Songbird is a JavaScript library that
can render HOA to stereo and the Web; visit:

https://opensource.googleblog.com/2017/08/bringing-real-time-spatial-audio-to-web-with-songbird.html

https://google.github.io/songbird/

Regards,
Martin

[Politis Archontis]

Hi Martin,

Interesting! Taking a closer look it seems like it’s an intermediate library to ease integrating ambisonic encoding to VR, or game scenes, and applying also some environmental effects (reverberation). The actual ambisonic processing is still handled by their Omnitone library.

Taking a look at the source code, Songbird has up to 3rd-order processing. Curiously, the Omnitone main branch is still at first-order processing only, but there is a development HOA branch, so I guess it is almost ready.
Some of the methods that we have used in our JSambisonics web audio library have also been incorporated, e.g. they are using the Ivanic and Ruedenberg rotation method for real spherical harmonics, which we have also found to be the fastest.

That’s a great development I believe, cause the FOA Omnitone binaural decoder, even though fast, was quite “blurry" spatially.

Regards,
Archontis Politis


On 01 Sep 2017, at 19:12, Martin Leese <***@stanfordalumni.org<mailto:***@stanfordalumni.org>> wrote:

Hi,

Google's Songbird is a JavaScript library that
can render HOA to stereo and the Web; visit:

https://opensource.googleblog.com/2017/08/bringing-real-time-spatial-audio-to-web-with-songbird.html

https://google.github.io/songbird/

Regards,
Martin
--
Martin J Leese
E-mail: martin.leese stanfordalumni.org
Web: http://members.tripod.com/martin_leese/
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[Gary Gallagher]

Thx for that.

Post by Politis Archontis
Hi Martin,
Interesting! Taking a closer look it seems like it’s an intermediate
library to ease integrating ambisonic encoding to VR, or game scenes, and
applying also some environmental effects (reverberation). The actual
ambisonic processing is still handled by their Omnitone library.
Taking a look at the source code, Songbird has up to 3rd-order processing.
Curiously, the Omnitone main branch is still at first-order processing
only, but there is a development HOA branch, so I guess it is almost ready.
Some of the methods that we have used in our JSambisonics web audio
library have also been incorporated, e.g. they are using the Ivanic and
Ruedenberg rotation method for real spherical harmonics, which we have also
found to be the fastest.
That’s a great development I believe, cause the FOA Omnitone binaural
decoder, even though fast, was quite “blurry" spatially.
Regards,
Archontis Politis
Hi,
Google's Songbird is a JavaScript library that
https://opensource.googleblog.com/2017/08/bringing-real-time-spatial-audio-to-web-with-songbird.html
https://google.github.io/songbird/
Regards,
Martin
--
Martin J Leese
E-mail: martin.leese stanfordalumni.org
Web: http://members.tripod.com/martin_leese/
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