If you use Twitter, you may have noticed a wave of tweets with built-in audio. Tap on the play button and the poster’s Twitter avatar, embedded in a jittery circle, plays audio.

Twitter blog:

Each voice Tweet captures up to 140 seconds of audio. Have more to say? Keep talking. Once you reach the time limit for a Tweet, a new voice Tweet starts automatically to create a thread. Once you’re done, tap the Done button to end your recording and go back to the composer screen to Tweet.

This is a pretty major step up for Twitter, both in terms of enhancing what can be shared, and in the demand placed on their servers.

Audio tweeting is limited to a small number of testing accounts at the moment but will roll out to everyone in the coming weeks. To see if you have the feature, compose a new tweet. If you see the camera icon to the left of your recent pictures (toward the bottom of your compose pane), you don’t have it yet. When you get audio, you’ll get a little waveform icon to the left of your camera.

I wonder how long it will be until we have video tweets.