Mixer : Overview
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General Mixing Bus Channel Configuration
All General Mixing Buses channel configuration can be changed at any time in the 3D Room Editor. Please
see: The 3D Room Editor on page 263
Room Models
Two types of room model are available:
Virtual Rooms use a Stereo panning based algorithm using either a Square Root or Sin/Cos panning law
extended to all three dimensions. In this mode speaker positions are fixed. This mode is designed for Film, Post
Production or Music where no real world room definition is needed or known in advance and precision is needed
to focus on each individual speaker.
Sized Rooms use a sound in air propagation/attenuation based algorithm. In this mode speaker positions are
editable. The panning algorithm uses real distances to compute levels. In this mode all speakers will output some
level even if it is very low, wherever the Panner is positioned.
The room type can be switched at any time in the Room Editor.
Panning Control Buses
Panning is achieved using Panning Control Buses. These are purely control buses, they don’t process any audio
and have no channels, no associated Output Strip and no I/O. Instead of having a separate panner on each Input
Strip Bus Send there is one or more Panning Control Buses. Input Strip Bus Sends are assigned to Panning Control
Buses or routed direct using a Channel Router matrix. One Panner can control several Bus sends in different for-
mats. E.g. when Mono, Stereo, Surround and Auro3D Buses are present. Equally, if it is desired to pan differently to
different Buses, this can be achieved by adding more Panning Control Buses.
The Panning Control Bus user interface in each Input Strip can be switched to one of three different panner types
or a direct Channel Router Matrix. Left-click on the Bus Send Pan 1 etc. label to open the Routing context menu
with the choice of:
Channel Router
Panner 1
Panner 2
etc.
Panner Types
Panner Type is selected by right-clicking on a Panner in the Strip to open the context menu and choosing: Set
Panner Type The sub-menu offers the choice of:
•None useful if you wish to hide the panner in a Strip using a Router
• 3D Panner, which gives access to the standard 2D surround control plus the Height/Z axis, divergence
and LFE gain.
• 2D Panner, which gives access to the standard 2D surround control plus divergence and LFE gain.
• Pan/Balance (1D Panner), which gives access to three types of panning (below) plus divergence and LFE
gain.
• On a Mono strip the control is always pan.
• On a Stereo strip the following choices are offered as Dual Source Mode
(Right-click on the Panner in the Strip to open the context menu and choose: Dual Source Mode
• None (Hides the Panner in the Strip. Useful if you don’t want to see the Panner in a Strip
where the Router is in use.
•Single Pan
•Dual Pan
•Balance
Note: Width control is the Source Size parameter when in Single Pan mode.
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