In many cases managers send task by a voice message over WhatsApp and similar IM apps. and then employee create a task on task management app.
I believe its good idea to add a feature users can share a voice message with ntask app and create a new task that shared voice message attach to task. and a default task title for example new voice task from CONTACT at DATE created.
then user must add some more text to describe it. also adding more details by recording a voice message can be record on task history.