I'm wondering whether there is some TRRS extension cable available which has a remote control for volume and play/pause that would allow to extend any headphones by a remote control, or alternatively whether I could build one myself using the remote control from broken Apple earbuds.
1 Answer
Yes, there are lots of them, check eBay, amazon, probably aliexpress.
Keywords I used are: iphone extension cable remote.
Most of them have a microphone as well.