Audio in from jack - out via bluetooth

[Android Central Question]

Has anyone ever considered using a samsung phone as an audio repeater? More below -

I know this is a strange request and has many, many technical issues. Just curious if anyone has ever tried or found a way to make it work - perhaps a new feature / accessory samsung!

I am often at the gym, my note 8 (or 3) streaming music to my bluetooth headphones. The treadmill has a tv with a headphone output but as you did correctly guess ... bluetooth headphones are wireless and can not plug in to listen in.

Yes, I could get a 3.5mm to bluetooth adapter (another thing to carry / pair to headset).

Yes, I could revert to wired headphones (giving up the modern wireless approach)

What I would love to do is plug my note phone directly into the treadmill and have it retransmit this to my bluetooth headphones.

I realize the treadmill is a audio output and the note 3.5mm jack is a microphone input (one issue)
.. not to mention that there is other technical issues.

Has anyone ever considered using a samsung phone as an audio repeater?

 

[Rukbat]

You'd need an app that takes mic in and sends it to Bluetooth out - along with the Bluetooth source you're listening to.

The "3.5mm jack is a microphone input" isn't an issue unless the mic input can't handle the level coming out of the treadmill's jack. That would normally be too much audio coming out of the TV, so all you'd need would be a little 3.5mm female-to-3.5mm male L-Pad or T-Pad (which, if not easily available, is easy to make) - about the worst you'd get without it would be distortion from the TV, even if you turn the volume way down. But that may be all that's needed. That and the app to do the work. I haven't seen any multiple source mixer apps. (If there is one, run that to mix the TV with your music, then run BTmono to send it all out to Bluetooth. All you need is a cable that connects ground on both ends and left or right audio on one end to mic on the other - at worst that would mean cutting off come of the cable sheath, then cutting 2 wires and connecting say blue from one end to red from the other end [I just made up the colors - you'd have to google android earphone schematic and figure out which goes to where - and probably use a continuity tester to determine which wire comes from which part of the 4-pole plugs].)