[opus] Antw: Re: Antw: [EXT] Opus merging streams
decoy at iki.fi
Wed Apr 6 13:21:28 UTC 2022
On 2022-04-06, Andrew Sonzogni wrote:
> So if I resume, it's better to decode, then use the sum of each
> channel scaled by the square root of the number of channels.
That's if you want to maximize your usage of bit depth. But I'd still
argue for just doing a sum. I mean, if your application is anything like
the one I'm envisioning -- the conferencing kind -- would you want
everybody to be able to speak at a constant volume? To shout over each
other without the havoc being compressed to noise?
Please, just work in say 24 bits, leave some headroom, and sum directly.
> Is that right ? Or is there some kind of trickier and better algorithms that
> I'm not aware of ?
Sounds about right.
> Sorry if my questions seems childish, I don't have that much
> experience in audio based algorithms and it's kind of fascinating how
> much it can be tricky to adjust correctly some parameters or even find
> the correct algorithms for a certain use case.
Nothing childish about it, and also, I'm no guru.
E.g. as I said already, that mix-normalization question of yours is
*ages* old and *never* to date settled. My preferred solution wouldn't
even have been implementable a decade back, and pretty much just
analogue cinematic sound engineers would abide by it.
Sampo Syreeni, aka decoy - decoy at iki.fi, http://decoy.iki.fi/front
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