Sound Devices PIX 220i - Manual (Page 22)

rates of 48 kHz. All digital signals connected to PIX are sampling rate converted to 48 kHz, including
signals sent at 48 kHz.
Input Linking
Setup Menu option: Audio  Input Linking
Inputs 1-2 can be linked together so that a gain adjustment to one channel will also affect the other
( See “Input Level Control”, page 21 ). When inputs 1-2 are linked, the limiters are also linked. 48V
phantom power, analog low-cut, and analog polarity settings are set independently for each channel,
even when inputs are linked.
Linked inputs are useful when the PIX is receiving a left/right stereo signal on inputs 1 and 2. Ex-
amples include stereo program from an external mixer, stereo program from a camera, and micro-
phones oriented in a stereo configuration.
M/S Matrixing
Mid-side (MS) matrixing is a method for processing audio signal from a cardioid microphone and a
bidirectional microphone into a stereo signal. The cardioid microphone is the “mid” signal and con-
nects to input 1, and the bidirectional microphone is the “side” signal and connects to input 2. The
cardioid microphone is pointed at the sound source, and the bidirectional microphone is oriented
sideways (positioned with its capsule as near as possible to the cardioid microphone’s capsule). the
following diagram shows the relative polar patterns of microphones in an M/S configuration.
Mid Signal
Side Signal
To produce a stereo signal from an M/S configuration, the signal from both microphones must be
processed. The PIX recorder can perform this processing on inputs 1 and 2 when Setup Menu option
Audio
 Input Linking is set to 1-2MS.
Choosing Audio Sources
The PIX recorders are capable of recording audio from the two analog audio inputs or digital sources
(AES3 or video input). The Setup Menu option Audio
 Audio Input provides the following options
for audio sources:
Audio Source Tracks on Recorded Files and Video Outputs
Analog XLR 1: Analog Input XLR 1
2: Analog Input XLR 2
AES (Digital) XLR 1-2ch 1: Channel 1, AES XLR A
2: Channel 2, AES XLR A
AES (Digital) XLR 1-4ch 1: Channel 1, AES XLR A
2: Channel 2, AES XLR A
3: Channel 1, AES XLR B
4: Channel 2, AES XLR B
PIX 220i and PIX 240i Video Recorder User Guide
20
v. 3.52 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
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