We are talking about a data port, even music is just data when you get down to it.
...
Think of a world where every headphone uses say USB-C
Okay, I thought of that world, and it's not the world we live in or we're gonna live in for...
many years.
it would mean you can get an awesome pair of headphones and use them with any device and get nice sound quality without using a portable DAC/headphone amp for you iPhone or computer anymore. The same port you use can be used by someone with a cheaper pair of headphones.
You
are using a portable DAC. Built into the headphones.
One for
each pair.
That you replace
yearly.
This is super uber wasteful.
This is
insane.
I mean, the next step is probably tossing the whole phone away (after using it to club baby seals to death) and buying a new one when you run out of battery.
Not on earbuds, but when plugging a computer into these awful stereos that use 3.5mm some people still use you can get a lot of artifacts and humming.
That's a stupid idea anyway.
Line inputs have usually a
much higher impedance and expect a much lower voltage.
They are simply not made to be connected to headphone outputs. Of course it sounds like horse poo.
Why do these discussions focus so much on how to recreate what we have today
Because that's how it will
always be: until the end of time you will have to have a DAC feeding a preamp connected to the moving coils.
You can do this the easy, cheap, sensible way or the hard way...
Would you really pick the option where the expensive unit (computer, phone) had a built in DAC
that you the user had no control over, and which can deliver very low power to your headphones? Or would you choose something where the DAC is located in the cheaper unit (so it is easier to upgrade), where more power can pass both ways and you are shielded from various interference. Where you can not only pass the music but any data you wish at the same time.
I would choose the sane way, of course: a data port for connecting any fancy A/V device I can think of, including a multitrack, 16 channel, 24/192 audio interface
and a regular jack for connecting my headphones to the on-board DAC, which provides sufficient quality for 99% of users (including those - probably a majority - that still have 128k MP3s around and don't notice the difference).
Note that there probably
is an on-board DAC anyway, unless they do away with speakers entirely, so why not use it to drive your college kid's el cheapo headphones?
The only reason we want to cling to 3.5mm is because we all have loads of expensive things that use it and it has been a standard for all of our lives.
The reason
I cling to it is because it is the sensible arrangement
