How to record sound from multiple microphones and output it to multiple headphones?

Question

Audio

Given :
3-4 microphones (USB/3.5), 3-4 pairs of headphones (USB/3.5) yourself, and others.
Questions :

• What hardware or software means to do this?
  
• If all the devices are connected via USB, the computer will not fly into space?
  
• If everything is connected by 3.5 jacks, then what device to buy for this?
  

PS: The microphone can be connected via USB or 3.5. Headphones too

Answer 1

It is unlikely that there is a solution that would allow you to properly solve your problem as you see it. For starters, no home computer has 4 independent 3.5-jack microphone inputs. Each USB microphone is visible to the system as an independent audio device, and DAW , through which you can record per channel, support a maximum of one interface. In principle, they can somehow be combined via ASIO4ALL , but it is not a fact that this will work well or work at all.
If the monitoring in all 4 pairs of headphones is the same or at most two different ones, then the standard solution for your case will be an audio interface (sound card) with 4 channels per input (for example, TASCAM US-4x4- from inexpensive). Connect 4 microphones to it via XLR, configure the DAW channels of your choice and monitor as you need. There are two headphone outputs on the audio interface, which means that two pairs of headphones can be connected without additional devices. If you need more, connect a device like this to the headphone output of the sound card (there are a million analogues - choose according to your taste), stick your headphones into it and write calmly.
You can connect 3.5 microphones to such a sound card through a 6.3 Jack adapter to the instrument input, but this, again, is a crutch.
If you need independent monitoring in 4 pairs of headphones, then there are audio interfaces with 8 channels per output, but these are already different prices.
In terms of performance, recording 4 channels does not carry any special load, any computer can handle it.