Attero Tech InBox/OutBox - Manual (Page 20)

InBox / OutBox
User Manual
 Attero Tech LLC 2010 Page 15 614-00005-04
If mono mixing is enabled between 2 channels, only the mixed audio is made available for network transmission. This
means only one output submap is required per mono mix. Rather than leave a spare output, the audio from any higher
numbered inputs is shuffled up to the next free output submap. For example on the InBox R8, with no mono mixing, inputs
1 and 2 are available on output submaps 1 and 2, while inputs 3 and 4 are available on output submaps 3 and 4 and so on.
If mono mixing is now enabled for channels 1 & 2, that mix is available on output submap 1. Input 3 and 4 will move up
and now appear on output submaps 2 and 3 instead. This also happens in the InBox M3 as well
This means that there will be less than 8 audio channels available for output. Those remaining unallocated channels are
thus allocated to an incoming network audio submap starting with the lowest, submap 33. This then allows an Inbox to act
as a bundle blender and ensure all eight channels within a transmitted bundle can be utilized.
On an InBox M3, this happens by default as ponly 5 channels are need maximum so there are at last three spare. However,
on in InBox r8, this is only possible if at least one pair of channels is mono mixed. For more details on using bundle
blending, see section 0. For a full list of how audio is allocated to the output submaps based on the various mono mix
settings, see APPENDIX B, section B1.
Note: Since this feature affects where audio is allocated, care must be taken when making changes once a device is
commissioned as this could affect the overall system audio design.