Vidicode V-Tap Manual page 29

Silence Timeout (per second)
This value is only used when Audio Activated Recording is enabled.
The end of a call is detected when the audio level is below the Audio
Start/Stop Level for the whole duration of the Silence Timeout.
When the timeout is too short, calls are split into multiple recordings.
When the timeout is too long, consecutive calls can be merged into
one recording.
The timeout on 0 (zero) is only useful in combination with the
Button Mode set to start-stop.
Automatic Level Control
The hardware can automatically control the amplification of the
input signals when the volume of the audio is low. The result may be
that the recording sounds less natural then a recording without ALC.
Amplification Channel A
Amplification Channel B
In the case Automatic Level Control is disabled, the amplification of
the input signals can be set manually to a fixed value.
In the other case that Automatic Level Control is enabled, the
volumes are controlled by the hardware automatically and the
amplification settings are unused, except the value 0.
There are two channels A and B, because the input signals can come
from a 4-wired handset cable (speaker and microphone signals) or
from the stereo audio input plug.
The amplification can be set from 1 till 63 (per +0.75 dB).
The value 0 is a special case; the channel is disabled for recording.
Other values can be added to set the following features:
+64 : Extra amplifier enabled for this channel only (20x boost).
+128 : Automatic Level Control enabled for this channel only.
+256 : Inject Notification enabled for this channel only.
+512 : Boost the recorded signal on this channel by +13 dB.
Handset Amplification
Extra amplifiers (20x) can be enabled when the audio signals have a
very low volume. Activating this setting is almost always needed
when the V-Tap is connected to the handset of a phone (4-wires).
V-Tap Analog 2 Manual EN v4.21 Sept 2021 © 2018-2021 Vidicode 29