Check out, in the following tutorial, how to speed up voice messages. The procedure was performed on the version of the app for the Apple smartphone, but the tips are also valid for Android owners. It is necessary to have the latest version of the messenger see how to update your apps.
Step 1. Play on the voice or audio message you received. Then, tap on the "2x" button in the upper right corner of the screen. The reproduction speed will be doubled, it is not possible to choose an intermediate acceleration.
Step 2. If you want to return to normal playback speed, just tap the "2x" button again to disable acceleration.