Normalizing, or, to be more precise, a fast reacting automatic level control would be much better indeed. Helps protecting the ears too. There are already enough people who damaged their ears e.g. by use of earbuds and not noticing that they hear much too loud when the volume of the sound changed because the sound was compressed (look up "loudness war").

@lonm Yeah, I thought it's an operating system level request, but it really isn't. Operating systems already do this. E.g.: You are listening to music through your laptop speakers on full volume, when you put in your headphones, the volume will switch to the last user-defined volume level on this output, the same if you unplug your headphones. The same happens on smartphones, just with a different implementation. Point is as long as you are using the normal audio jack, the operating system has no idea what is plugged in in the first place. If you really want control, then using a dedicated DAC would be your best option.

@luetage said in Volume Mixer on Tabs: It's not possible for Vivaldi to send an array of different channels with different volumes to the input of the operating system mixer Reading through the original request again, I'm not sure what the OP meant any more... I was referring to the idea of an internal "mixer". I don't know how it works in Chrome, as I don't have it installed on my PC, but I checked Edge and it generates separate "entry" in the system's volume mixer for each tab with active audio, whereas in Vivaldi it's always one entry, even for separate windows (its title is derived from the currently active tab and it changes accordingly). So, there are two different approaches I suppose. Obviously, it's harder than muting tabs. I'm wondering which way would be easier (in general) to implement though: the internal mixer or separate channels for the system's volume mixer...

@Amblypygid I believe your request is close to what @kyu3a request in https://forum.vivaldi.net/post/128253 That thread also the current place where all request reside. I didn't say your both request identical. @kyu3a request is a multimedia player in tab, if Vivaldi detect playable multimedia content. If that multimedia player actually implemented, your request is only part of it. I believe you could imagine that.