360 Systems MAXX-2400SD - Manual (Page 21)

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MAXX 2400 Owners Manual Page 21
Note:
Internal jumpers select between analog or digital audio. Both analog and AES/EBU audio signals
are not available at the same time on a given input or output channel. However, each channel’s
pair of inputs and outputs can be set up differently, if desired. See Appendix A.
A set of XLR-3 connectors allows high-quality connections to be made in either format. Embedded
audio appears in the SDI output stream at all times. Refer to Appendix A for instruction on how to
set the unit up for analog or digital audio.
Analog Audio Capability
When the analog audio format is selected, each video channel has two audio channels, recorded
together as a stereo pair. Internal trimmers allow adjustment to unity gain. Refer to APPENDIX H -
AUDIO LEVEL CALIBRATION. The outputs carry channels 1 and 2 when four channel material is
played back.
Digital Audio Capability
When AES/EBU digital audio is selected, each video channel has four audio channels, which are
recorded as two stereo pairs. Because a single XLR connector carries a stereo pair in AES/EBU
format, and only one (monaural) channel in analog, the server provides an extra pair of audio
channels when used with AES/EBU audio signals.
Embedded Audio Capability
When SDI embedded audio is selected, four audio channels are available for recording. Embedded
audio is always inserted in the video outputs. Note that discrete audio (analog or AES/EBU) is also
available on XLR connectors, at the same time embedded audio appears in the video stream.
Embedded audio has a 20-bit resolution. Refer to Using Embedded Audio on Page 69 for details on
using embedded audio.
Audio Word Size and Sample Rate
The MAXX 2400 employs 24-bit audio A/D and D/A converters, and records audio into a 24-bit
frame, regardless of the word size received. The sample rate is fixed at 48K. When using the
AES/EBU digital input, the 48K sample rate of the incoming digital audio must be derived from the
video genlock reference. If it is not, or if a different sample rate is used, the MAXX 2400’s input
sample rate converters must be selected. Refer to Using Audio Sample Rate Conversion on page
71.
Note:
Encoded audio streams , such as Dolby E® ®must be referenced to video genlock, and the input
sample rate converters must be disabled when recording such streams.