This could be caused by a couple of settings. One cause could be the Variable Control Voice Actuator (VCVA) being activated. The 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.
Another cause could be that the storage card could have corrupt sectors and needs to be formatted. You can deactivate the VCVA and/or format the storage card by following the below steps. Keep in mind that formatting the card will erase any dictations on the card. This issue can occur on other models such as the 3400 though the Menu path may very slightly.
Format the card on the recorder:
Select Menu>Device Menu>Format>Start>Start (again when prompted)
Deactivate VCVA on the recorder:
Select Menu>Record Menu>VCVA>Off
Verification Source: In-house testing
Test Date: 04-12-12