Audio inputs – Sound Devices PIX 250i User Manual
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PIX 250i User Guide
13
In
puts & Outputs
The output video stream contains up to 16 tracks of embedded audio for SDI and 8 tracks for HDMI.
Timecode and record start and stop flags are included on the SDI output.
Timecode overlay can be added to the HDMI and/or SDI output signal in
[Video - Video Output OSD]. The timecode overlay is displayed in various colors to indicate the cur-
rent transport state of the PIX 250i: White = Stopped, Red = Record, Green = Playback.
Audio Inputs
The PIX 250i can record up to 16 tracks from a variety of audio input sources:
Input Type Count
Connector(s)
Gain
Details
Analog
2
1-2: XLR (LINE IN 1/2)
Off, -25
to 20 dB Balanced, Line-level, XLR.
AES Digital
8
1-8: DB-25 (CH 1-8 AES IN/OUT) Off, -25
to 50 dB
Selectable between AES or HDMI with Setup
Menu option [Audio - HDMI/AES Select]
HDMI Digital
8
1-8: HDMI Input
Off, -25
to 20 dB
Selectable between AES or HDMI with Setup
Menu option [Audio - HDMI/AES Select]
SDI Digital
16
1-16: SDI Input
Off, -25
to 20 dB
Analog Audio Inputs
The PIX 250i has two, high-performance, line-level analog audio inputs on XLR3-M connectors.
Digital Audio Inputs
The PIX 250i accepts digital audio from HDMI, SDI, and AES/EBU inputs. All audio is sampled at
48kHz.
AES3
The PIX 250i accepts AES3 (AES/EBU) digital signals with sampling rates from 32 kHz up to 192
kHz and bit depths up to 24-bits. AES3 inputs are sample rate converted to 48 kHz.
HDMI / SDI Embedded Audio
The PIX 250i accepts 8 channels of embedded digital audio on the HDMI Video Input or 16 channels
of digital audio on the SDI input.
Sample Rate Converters
All digital inputs have Sample Rate Converters. These help ensure synchronization of digital audio
from multiple sources.
Choosing Audio Sources
Audio Input Source is selected in the Audio Screen in the Source column. To setup an input:
1. Press AUDIO to access the Audio Screen. If the Source column is not visible, press AUDIO
again to reveal it.
2. Rotate the Control Knob to select the desired track.
3. Press the Control Knob to focus the highlighter on the selected track’s parameters. The high-
lighter will become orange and focus on a single column in the track.
4. Rotate the Control Knob to highlight the Source column.