Step-1 Click on the comment button of the activity stream.

Step-2 Click on the Record Audio button to open an audio recorder.

Step-3 Click on the Record button to start recording.

Step-4 Click the Stop button to end recording. Your audio file is ready.

Step-5 Click Upload button to save the audio in ERP.

Step-6 Now close this window and you will see the audio file in the Activity Stream. Click on "Speech to text" (Highlighted in the image below) button to convert audio to text.

Step-7 The result is shown in the following image.