Hi Augustime. Browsers that are able to play multichannel streams can have their output downmixed by the OS. So, yes, Chrome can play surround streams without downmixing, but we cannot assume that target audiences can always setup their systems properly.
As for Android, phones are (mostly) limited to stereo. But Android can play multichannel streams on devices that have a multichannel output (like televisions sets or boxes) through HDMI, TOSLINK, or USB sound modules. More details here: https://source.android.com/devices/audio/ -- Marc On Fri, 23 Oct 2015 22:12:33 +0100, Augustine Leudar <[email protected]> wrote: > I think you are. So browsers just downmix 5.1 or 7.1 to stereo ? And > treat any other multichannel files the same ? And android chrome can > actually play 5.1 without down mixing ? That's odd because phones are > not my first choice for playing multichannel audio. It's a mess all > right . > > On Friday, 23 October 2015, Marc Lavallée <[email protected]> wrote: > > > Hi Augustime. > > > > I used Ambisonics as an example (or a "use case"); all surround > > formats requires more than 2 channels (appart from UHJ). The > > problem is that Firefox (and other browsers) don't support more > > than 2 channels. Sometimes the problem is on the device or the > > operating system; although Chrome supports more than 2 channels, on > > the Android OS the number of channels available to Chrome is > > limited to 2. > > > > Worst: most audio API and codecs *assume* that "multichannel" means > > something like "5.1" or "7.1", and apply default rules. Audio API > > (and codecs too) should just expose their channels in the order of > > the audio stream, and not try to decide what is the surround scheme > > by looking at the number of channels. > > > > There's a reason why multichannel audio is so difficult; in order to > > help programmers, most audio API are making things more confusing... > > > > I guess I'm not really answering your question... > > -- > > Marc > > > > On Fri, 23 Oct 2015 21:32:14 +0100 > > Augustine Leudar <[email protected] <javascript:;>> wrote: > > > > > What about other forms of surround sound that are not ambisonics ? > > > > > > On Friday, 23 October 2015, Marc Lavallée <[email protected] > > <javascript:;>> wrote: > > > > > > > The problem is that Mozilla (and maybe others) just need to fix > > > > (or better document) their version of the Web Audio API. Then > > > > it'd be possible to decode ambisonic at any order. Chrome does > > > > a better job, but it's (hopefully) a temporary monopoly, since > > > > Mozilla is organising the Web Audio Conference. > > > > -- > > > > Marc > > > > > > > > On Fri, 23 Oct 2015 09:37:06 +0100 > > > > Dave Malham <[email protected] <javascript:;> > > > > <javascript:;>> > > wrote: > > > > > > > > > I think the problem is the fact that at least one of the > > > > > decoders needed is proprietary so costs money to include > > > > > which makes it difficult for free browsers, if not backed by > > > > > mega corporations. Of course, I could well be wrong (again) > > > > > but it is a shame when Mozilla loses it's position as the > > > > > most standard compliant browser, especially when it impacts > > > > > audio. > > > > > > > > > > Dave > > > > > > > > > > > > > > > On 22 October 2015 at 13:44, David Pickett <[email protected] > > <javascript:;> > > > > <javascript:;>> wrote: > > > > > > > > > > > Bruce Wiggins' webpage on browsers that play surround > > > > > > recordings using the HTML5 <audio> tag is 3.5 years old. > > > > > > > > > > > > http://www.brucewiggins.co.uk/?p=265 > > > > > > > > > > > > I dont use IE, and Firefox doesnt play ball at all on the > > > > > > PC, so I use Chrome for multi-channel aac files. > > > > > > > > > > > > http://www.fugato.com/pickett/surround-tests.shtml > > > > > > > > > > > > But it is disappointing to think that no other browsers have > > > > > > caught up in the last three years. > > > > > > > > > > > > Has anyone tested any others with multi-channel files? > > > > > > > > > > > > David _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
