How the voice tweet feature works:
Voice tweets are not different from text tweets. To start, open the Tweet composer and tap the new icon with wavelengths. You will see your profile photo with the record button at the bottom – tap this to record your voice.
Each voice tweet captures up to 140 seconds of audio. However, once you reach the time limit for a tweet, a new voice tweet starts automatically and creates a thread. Once done, tap the ‘Done’ button visible on the top right corner to end the recording and go back to the composer screen to publish voice tweets.
People will see your voice Tweet appear on their timeline alongside other Tweets. To listen, tap the image. On iOS only, playback will start in a new window docked at the bottom of your timeline and you can listen as you scroll. You can also keep listening while doing other things on your phone or on the go.