When there is original sound which is already recorded, it’s possible to press a button of “Preview” and “Delete”.
When there is no original sound which is already recorded, it’s possible to press a “start REC” button.
Because it starts to indicate the volume level from recording starting, so it became easy to catch at timing of “recording stop”.
Try to make your own shutter sound with this!
The sound level of the shutter sound is changed by volume button.