POWER CORE User Manual
Version: V6.0.0/5
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9. Audio Mix Engine
9.2
Summing Busses
9.2.1
Bus Anatomy
Each bus is called a ‘summing bus’, and can be mono, stereo or 5.1.
The naming, assignment of signal processing and bus attributes are all made by the system configuration.
The first pair of busses is always pre-defined as stereo PFL 1. The remaining busses can be "user" defined as
any of the following:
·
Sum Bus
– normal summing busses can be allocated DSP and assigned to a fader strip. Typically,
these are used to create aux sends, groups or extra main outputs.
·
GP Sums
– cannot be allocated DSP or fader strip control. They are ideal for applications such as a
talkback bus.
·
Conf Busses
– these busses have special facilities for generating a mix minus (N-1).
·
PFL
– additional PFL busses (up to 5). For example, in a multi-operator surface, each station might feed
a different PFL bus/output.
The signal flow for each summing bus is the same as for a source, see
The maximum number of busses which can be added to the configuration, and their DSP resources, is
determined by the license package for the System Core.
The configuration also defines whether you can re-assign busses from the control surface, or whether sources are
‘hard wired’ to each bus. For example, you may choose to 'hard wire' sources to the programme bus for simplicity
and security.
If summing busses cannot be assigned to the control surface, then they are output from the console at unity
gain (0dB).
A stereo bus uses two and a 5.1 bus uses 6 summing bus resources.
9.2.2
Creating Sum Busses
Use the "
Sum Bus
" branch of the ‘Tree Definition’ to insert and configure summing busses.
Each bus can support several sets of parameters. Switch between them using the menu tabs at the top of the
parameter area.
The most important fields are the
Name
and
Type
(defined in the
Parm
tab):
A sum bus
must
be named before it can be referenced to other elements via the 'Tree Selection'.
The
Type
defines whether this is a normal summing bus (mono, stereo or surround) or a special bus such as
R3LAY.
