You can choose to accept or reject voice notes messages. You can apply this setting individually for different personas and this setting will apply to the voice notes for all one-to-one chats in that particular persona. However, you will still receive voice notes for group chats.

To enable / disable voice notes:
Go to Dashboard > enter a specific Persona > Tap the setting icon on the top right corner > Tap Privacy > Turn ON / Turn OFF “Accept Voice Notes”.

You will still be able to send voice notes to both one-to-one and group chats after you disable receiving voice notes.