Pearl Mini User Guide
Adjust audio gain and delay
configuration of your equipment. The audio delay feature helps you adjust audio coming from external
sources so that your video and audio sources are synchronized when captured, streamed, and recorded.
You can apply from -300 ms to +300 ms of delay to any audio source using the Admin panel or Pearl
Nano's front screen. By default, there's 0 ms of delay applied to audio sources.
Adjusting the
Input Gain
for an analog audio source affects the volume for that audio source in
recordings, streamed output, video output ports, and in the headphone jack. Be aware that excessive
amounts of gain can increase the perception of any noise that may be present in the audio signal.
If the gain of your analog audio signal needs adjustment, connect your headphones and use the VU
meters to monitor the audio level while you add some gain. As a rule, each 10 dB of gain doubles the
perceived loudness of the audio signal.
This table offers some guidelines for adjusting the gain at the audio input port of Pearl Mini for common
types of audio input devices. You should add the suggested gain to the audio input to get an average
signal to register at a nominal level in the VU meter (i.e. where the green bars change to yellow). The
actual amount of gain needed depends on the strength of the original audio signal.
Table 27
Audio input port gain guidelines
Audio source
Input
port
Gain
Dynamic microphone
XLR
Add +50 to +60 dB gain to the audio input port.
Electret microphone
XLR
Add +18 to +40 dB gain to the audio input port.
3.5 mm
Add +6 to +12 dB gain to the audio input port.
Wireless microphone
receiver
XLR
Add +18 to +40 dB gain to the audio input port.
3.5 mm
Add +6 to +12 dB gain to the audio input port.
Condenser microphone
with phantom power
XLR
Add +40 to +60 dB gain to the audio input port.
Mobile phone or other
consumer line level
device
TRS
Add +6 to +12 dB gain to the audio input port.
XLR
Add +6 to +12 dB gain to the audio input port.
RCA
1
Nominal
Professional mixer
TRS
Nominal
XLR
Nominal
RCA
Not recommended.
135
