Build 21 v21.4.1
© 2007-2010 RED.COM INC. FEBRUARY 23, 2010
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AUDIO RECORDING
The RED ONE includes four channels of analog audio input processing, Peak Level meter, headphone
monitor and 2-channel balanced analog audio output. Audio is digitized at 24-bit depth and 48 KHz and
recorded in synchronization with video and timecode to the attached media. Digital audio is also embed-
ded in the HDMI, Preview and Program HD-SDI outputs.
Line Level and Microphone Level analog audio input signals are routed via a high quality A/D and pre-
amplifier, whose gain stage may be controlled using the Input Level control to achieve the desired audio
reference / recording level.
To assist with audio operating reference level setup, the camera provides a color-coded 3dB per division
Peak Level meter with 0dBu (-2odBFS) Witness Mark in the Graphical User Interface.
Peak Level meter range is –34dBu to +20dBu (-54dBFS to 0dBFS) and provides clip indication.
LINE LEVEL INPUTS
Line level audio inputs are designed to operate at unity gain (0dB Input Level); therefore an appropriate
line output level should be established by your field production mixer or other external signal source.
Reference signal level for Line inputs is 0dBu / 0.775 volts RMS / -20dBFS when operating at 0dB Input
Level. The maximum input signal that can be applied before the onset of input signal clipping is +18dBu /
6.5 volts RMS / - 2dBFS. I.e. this setting supports a guaranteed minimum of 18dB of input signal head-
room above reference, plus the maximum available Signal to Noise Ratio for the resulting 24-bit digital
recording.
MICROPHONE LEVEL INPUTS
The recorded signal levels of Microphone inputs are affected by the sensitivity of the microphone and the
Input Level setting. Range is +36dB to +54dB, with a default value of +36dB. The camera operator
should choose an Input Level that aligns the input signal to the reference line drawn vertically through the
camera’s PPM, indicating 0dBu.
This setting supports a guaranteed minimum of 18dB of input signal headroom above reference, plus the
maximum available Signal to Noise Ratio for the resulting 24-bit digital recording.
VIDEO MONITORING OUTPUTS
In its default configuration, the RED ONE camera can simultaneously support a RED EVF, RED LCD, 3
HD-SDI outputs and one HDMI output, with two of these outputs supporting full GUI overlay graphics.
Default setting for GUI support is RED EVF and RED LCD. However, if either one of these is not present,
full GUI overlay support is automatically enabled on HD-SDI and HDMI outputs.
RED EVF: 1280 x 848 resolution RGB 4:4:4 progressive video display with Surround View, frame guides
and safe action / title overlays, zebra and false color exposure overlays, waveforms, camera status and
operation menus.
RED LCD: 1024 x 600 resolution RGB 4:4:4 progressive video display with Surround View, frame guides
and safe action / title overlays, zebra and false color exposure overlays, waveforms, camera status and
operation menus.
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