How does an audio miniplug deliver 7.1 surround with headpho

Microsoft Windows 7 home premium
October 26, 2020 at 16:27:06
Specs: Windows 10, i7 9700K
Ok, so I'm 40 and I'm just starting to play video games. I was looking at maybe buying surround sound headphones. But, most of them are not USB, but the mini audio plug... the same connection that's been used for headphones for 40 years. They only have 2 channels. You can see it on the plug where there are dividers. Definitely not 8 channels (7.1). It's analog so you cant send more than one signal down one wire. So, how in the world does it give 7.1 surround sound? I've wired many home theaters. The Blu Ray sends 7.1 channels to a receiver via fiberoptic. From there, you run 8 different speaker wires. That fiber optic is sending the raw data to the receiver where it breaks it into 7 channels. But the audio tracks are recorded on the disc as 8 separate channels. So, it doesn't make sense to me how a two conductor plug can have 8 channels.

See More: How does an audio miniplug deliver 7.1 surround with headpho


#1
October 27, 2020 at 07:20:15
See if this article helps: https://www.ign.com/articles/2010/0...

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#2
October 27, 2020 at 10:06:17
Still doesn't explain to me how 8 separate channels make it to the headphones.


https://www.newegg.com/tritton-tri-...

these are supposedly true surround sound headphones. If you look at the picture closely, there are only 2 wires coming out of the headphones. It can be converted to either a miniplug or USB... but two conductors coming out of the headphones means only two channels are making it to the headphones. Now if it's somehow simulating the 7 channels once it gets to the headphones... but it says this is true surround sound... not simulated. The only way to have true surround sound is to deliver 8 channels or whatever directly from the source (where the creator recorded 8 separate channels) to the speakers whether it's via fiber optic or a cable that has 8 conductors on it so 8 channels can be separated down one physical wire.


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#3
October 27, 2020 at 11:16:30
Encoded digital feed (zeros and ones) which is then decoded within the headset built-in electronics?

That's how data is transmitted across the www so likely the asme approach in this situation?


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#4
October 27, 2020 at 16:51:52
trvlr, that's what i would expect for a true 7.1 sound from headphones. But seeing there are only two conductors... and a miniplug (the plug that we've used for headphones for 50 years) is analog. It's not sending a digital signal over the miniplug.

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#5
October 27, 2020 at 17:30:09
Digital needs only two wires... or does it need more?

What do you hear if you plug into the surround sound system?

And what do you hear if the same headset is plugged into standard analogue?

Standard stereo headphones actually have three cores in the cable into the mini jack plug. Left and right channels and the common negative/ground - which also acts as the screen on the cable?

message edited by trvlr


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#6
October 27, 2020 at 18:13:53
I know about ground... but two main wires that send the signal. I just know how I've wired many of my surround sound systems over the years. Whatever has the surround sound source has to get all 6 or 8 channels from the source to the receiver somehow. This is done via coax or fiber and is sent over the fiber or coax digitally. From there you run 8 separate audio cables to each speaker. So, the only two ways I could see getting 7.1 channels to a headphone is having 8 separate wires (well 9 including a ground) within the cable from the PC to the headphones or by having the signal from the PC to the headphones be digital and have a surround sound receiver built into the headphones that is separating the channels and sending them to different speaker drivers to give you surround sound. But, a mini plug that has been used on headphones for the last 40+ years isnt digital and there definitely isn't 8 conductors on the headphones jack.

message edited by dorlow


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#7
October 27, 2020 at 19:57:45
So, I just ordered a Logitech G432 headset. From what I can tell, it connects to the pc via usb... so the sound card is built into the headset so it makes sense to me that the 8 channels are getting to the headphones that way.

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#8
October 28, 2020 at 19:19:19
So, I got the G432 headset in the mail today. It's backwards from what I thought it would be. It's a miniplug and then it adapts to USB... still begs the question how does it work. Only thing I can think is when I plug the miniplug into the USB converter, it recognizes in the headphones that's connected to USB and connects like a USB device would. I know USB doesn't have 8 wires, but it's digital so it could send all 8 channels to the headphones digitally unencoded and the headphones can separate the channels. I don't know. I like to know how stuff works.

I tried the headphones with Call of Duty Modern Warfare. I made sure to change the audio to be using surround sound. It wasn't super impressive... but I could tell a little bit that it sounded like surround sound.


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