Question: What is VCVA?

Variable Control Voice Actuator (VCVA) is a function that sets up the recorder to record automatically only when sound is detected at a pre-set level, and stop when the sound drops below the threshold level. The purpose of the function is to eliminatedead air” during recordings, thereby conserving memory and shortening file times.

VCVA is enabled in the recorder menu.
Verification Source: Olympus Website