https://xiph.org/flac/format.html
* 8 channels: front left, front right, front center, LFE, back
left, back right, side left, side right
This is the agreed ITU/Wave order, by the way.
So the FC (or just C ) channel is the 3rd channel, after the two
stereo channels.
(“I know” that Blu-Ray 7.1 changes the position of the BL/BR and SL/SR
pairs, but this is the exception. )
Regarding binaural playback of “flat” ambisonics, I listened to this
and think that this sounds rather artificially. (I will a bit more on
this quite soonly anyway...)
You very probably would need brirs, in that case.
Best,
Stefan
----- Mensagem de Panos Kouvelis <pan...@gmail.com> ---------
Data: Mon, 1 May 2023 22:18:39 +0300
De: Panos Kouvelis <pan...@gmail.com>
Assunto: Re: [Sursound] FLAC and max number of channels
Para: Marc Lavallée <m...@hacklava.net>
Cc: Surround Sound discussion group <sursound@music.vt.edu>
Thanks for the input Marc.
I come from the gaming industry, and many practices can be adopted for
broadcast and linear content delivery.
From my research, I can confirm that the FLAC version worked better on your
2015 demo, because of signal preservation.
In my experience, regarding modern browsers like Chrome, if I configure my
sound card from Windows to see a 7.1 system in the outputs, the browser can
play that back without any further actions from me.
*Pan Athen*
SoundFellas <https://soundfellas.com/>, *MediaFlake Ltd
<http://mediaflake.com/>*
Digital Media Services, Content, and Tools
On Mon, May 1, 2023 at 8:10 PM Marc Lavallée <m...@hacklava.net> wrote:
To my knowledge browsers don't support more than 8 channels, and
configuring them for outputting more than 2 channels is probably a
challenge for most users. One solution is to use MPEG-DASH and
reassemble parts and decode them. But as with anything "Hi-Fi", the
reproduction system is key, so unless people have individual HRTF and
calibrated headphones, it may not be worth streaming Ambisonics to
browsers with a lot of resolution. I don't know how many browsers are
driving multichannel surround systems.
The Internet can work without browsers, so for exotic uses cases (like
Ambisonics) using dedicated software is a solution, in order to easily
configure the system for more than 8 (even 2) channels, use the most
appropriate codec (like the gaming industry is doing).
In 2015 (before Google and Facebook) I coded a little horizontal-only
demo (https://ambisonic.xyz/) using 3-channel files; I tried with the
AAC, Opus and FLAC codecs, and (to me) it sounds better with FLAC, maybe
because phases are preserved between multiple channels, while Opus
sounded the worst (even if it is officially supporting Ambisonics). I'm
sorry that my demo is (again) not working because of browser updates
that are breaking web sites with unconventional features. A next fix
could try to use WavPack.
Marc
Le 2023-05-01 à 11 h 28, Panos Kouvelis a écrit :
I see,
Then as suggested by others, and as I just read online, I think that
WavPack might be a good alternative?
Were you able to stream more than 8 channels using Opus on Safari? I
think
I read somewhere that it's not possible to stream more than 8 channels in
Safari in general and I would like to confirm that if you have that
information.
Cheers!
*Pan Athen*
SoundFellas <https://soundfellas.com/>, *MediaFlake Ltd
<http://mediaflake.com/>*
Digital Media Services, Content, and Tools
On Mon, May 1, 2023 at 10:43 AM Bo-Erik Sandholm <bosses...@gmail.com>
wrote:
We use webaudio api and a modified omnitone.
We use up to third order and can play wav, aac-lc and opus on most
platforms.
We have thought to use multitrack mp4/m4a with 2 × 8 channels with
libfdk
heAAC which is the best available AAC-He codec for private persons ,
but it
also have a 8 channel limit.
The fetch and audio buffer is handled as they are in the mp4 container.
But we do not have the knowledge to write the code to use WAAPI
transport
functions, and feed them into the decoder.
We use the built in os codecs for all platforms.
IOS has the most limitations.
Bosse
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://mail.music.vt.edu/mailman/private/sursound/attachments/20230501/f18feb56/attachment.htm>
_______________________________________________
Sursound mailing list
surso...@music.vt.eduhttps://mail.music.vt.edu/mailman/listinfo/sursound -
unsubscribe here, edit account or options, view archives and so on.
----- Fim da mensagem de Panos Kouvelis <pan...@gmail.com> -----
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://mail.music.vt.edu/mailman/private/sursound/attachments/20230502/45fd0e62/attachment.htm>
_______________________________________________
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit
account or options, view archives and so on.
