Epiphan Pearl Mini Live Video Production System with 512GB SSD (NA/JP) - Manual (Page 128)

Pearl Mini User Guide Adjust audio gain and delay
2. From the Inputs menu, select the shared audio source. The audio configuration page opens.
3. From the Input menu, select the audio source and click Apply.
Adjust audio gain and delay
Pearl devices do not introduce audio delay and have near-zero latency when capturing. However, other external
factors can cause audio to become de-synchronized, such as the length of audio cables or the 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 26 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.
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