Zoom H4essential Operation Manual page 64

Capturing audio before recording starts (pre-recording)
The input signal is always buffered for a set amount of time, so it can be captured (pre-recorded) for up to 2
seconds before the time when
This is useful when
1.
On the Home Screen, use
This opens the Rec Settings Screen.
2.
Use to select "Pre Rec" and press
3.
Use to select "On" and press
The amount of time that can be pre-recorded when this is set to "On" depends on the sample rate
setting (→
Setting the sample
Sample Rate
44.1 kHz
48 kHz
96 kHz
is operated to start recording.
is operated late, for example.
to select
rate).
(Rec Settings) and press
to confirm.
to confirm.
Pre-recording time
2 seconds
2 seconds
1 second
64
.