Epiphan Pearl Mini Live Video Production System with 512GB SSD (NA/JP) - Manual (Page 28)

Pearl Mini User Guide Selecting an audio source for Pearl Mini
5. (Required for recording on Pearl Mini and Pearl Nano) Install and format a storage solution. For more
information, see Install and format an SD card for the Pearl Mini and Pearl Nano .
6. (Optional) Plug headphones into the 3.5 mm headphone jack at the front of the Pearl device to monitor the
video signal's embedded audio. For more about monitoring audio, see Monitoring audio .
7. (Optional) Start recording:
a. Pearl Mini or Pearl-2 - tap the red dot that appears in the top right corner of the screen to start and
stop recording the channel. The dot flashes while recording.
Recordings are saved to the SD card on Pearl Mini and Pearl Nano by default. When the SD card is full,
new recordings overwrite the oldest recordings. Do not eject the SD card while recording is in progress as
that may corrupt the SD card.
Selecting an audio source for Pearl Mini
The audio that's coming from the connected HDMI video sources (HDMI-A and HDMI-B) is automatically used as
the default audio source for the HDMI-A and HDMI-B channels on Pearl Mini. You can choose different audio
sources for a channel using the Admin panel and do things like adjust the input gain, see
Adjust audio gain and
delay .
Select your audio sources from connected video sources (SDI, HDMI, USB video UVC, SRT, and RTSP), as well
as from the dedicated analog audio input ports. The USB (UVC/UAC) ports on the rear panel of Pearl Mini will
accept a USB microphone (UAC).
Dedicated analog audio inputs ports are:
l Two XLR/TRS combo jacks.
l XLR mic-level input (balanced), supports 48 V phantom power
l TRS ¼" professional line-level input, + 4.0 dBu up to 12.3 V RMS, (+24 dBu)
(balanced/unbalanced)
l One 3.5 mm stereo mic level input for electret microphones (unbalanced)
l One stereo pair RCA consumer line-level input (-10 dBV)
The XLR and TRS combo jacks are configured as a left/right stereo pair by default, see Configure audio ports for
stereo or mono . The 3.5 mm audio ports and the RCA audio ports are linked. You can configure Pearl Mini to use
both or just one of the audio sources using the Admin panel, see Assign audio sources to an input .
This table offers some guidelines for adjusting the gain of the audio input ports for common types of audio
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 4 Audio gain guidelines for different audio devices
Audio source Input port Gain
Dynamic microphone XLR Add +50 to +60 dB gain to the audio input port.
BETA DRAFT - 17