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Old 19th December 2019
Here for the gear

Originally Posted by Jay Rose View Post
Not sure I understand. You're generating TTS on the desktop and want to capture it ("computer's line out and to my smartphone's jack"), but your phone wouldn't accept a line in? Why not use one of the many audio capture utilities for Windows or Macs? AFAIK, you can even still do it within Audacity Windows.

AFAIK the 1/8" jack on smartphones use tip and ring for left and right, then common on the second ring, then mic in on the part of the sleeve closest to the shell. A normal patch cable won't hit the input properly. I also believe the phones are looking for a much smaller signal than a headphone jack on a desktop will provide, and carry a DC voltage that might cause distortion in the desktop headphone output... but I haven't physically tested this.

If you want to record from the desktop into your phone (without using the speaker and mic), you need an adapter like this . But it's designed for standalone mics into the phone, and signal level might still be an issue.
Thanks for the reply.
My goal is to provide an on-the-fly sound to the Google Speech to Text, so it saves the whole audio as a text file.

Simple showcase: I want to have an mp3 playingblack in my desktop and at the same time it plays, its lyrics should be written in an SMS, using Google speech to text on my phone, using a cable as a connection between desktop and mobile.

Is that clear enough?