Sound Devices PIX 270i - Manual (Page 34)

PIX 270i User Guide and Technical Information
v. 2.10 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
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Recor
ding
If recording camera audio embedded on HDMI or SDI, then the audio/video alignment will be ex-
cellent provided the alignment is proper on the camera.
If recording audio using the dedicated audio inputs (Analog, AES, MADI, or Dante), then a delay
may need to be dialed in. The reason for this is that some cameras have a delay of one or more
frames from lens to SDI/HDMI output. The PIX 270i on the other hand has no appreciable delay
between audio and video. This means that if the camera does have this delay, the audio will lead the
video as recorded by the PIX 270i. Note that on some cameras, the lens-to-SDI/HDMI delay changes
with resolution/frame rate. The best practice is to test the audio/video sync using a clapper slate
on a test file for each camera resolution/frame rate to be used on a project before starting. See Audio
Input Delay Control for details
Audio Track Arming
Up to 64 Tracks of audio can be recorded in both Audio and Video modes. Tracks must be armed in
the Audio Screen in order for them to be recorded. Armed audio tracks will have a red background
in the Arm column. Unarmed audio tracks will have a black background in the Arm column. To arm
or disarm Tracks for recording:
1. Press AUDIO to access the Audio Screen.
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 Arm column (The Arm column is the left-most col-
umn and displays the track number).
5. Press the Control Knob to access the Arm Menu. Turn the Control Knob to select On, Off,
All On , or All Off. (All On and All Off will change the arming status of all tracks, regardless
of which track is selected).
Changing a track’s Input Source to Off will disarm the track.
When [Audio - Audio Mode Sample Rate] is set to 88.2k or 96k, tracks 33-64 are disabled.
Audio Mode
When Setup Menu option [System - Video/Audio Mode] is set to Audio Only Poly (Wave) or
Audio Only Mono (Wave) the PIX 270i is in Audio Mode. In Audio Mode, the PIX 270i records only
audio signal to uncompressed PCM .wav files.
Polyphonic or Monophonic WAV Files
Audio Only Poly (Wave) mode writes a single file to each target drive per take. All armed audio
tracks are interleaved into a single file.
Audio Only Mono (Wave) mode writes a file for each armed track to each target drive per take.
Mono files will be named according to [File Storage - File Name Format] with the addition of an
underscore (“_”) character followed by the track number at the end of the file name.
If File Name Format is set to Reel-Scene-Take_Track Name, a WAV mono file will be given names in
the following format: <Reel>-<Scene>-<Take>_<Track #Track Name>.