Modules And Frames; Loadlibrary And Fingerprints - Lab.gruppen PLM Series Operation Manual

8.3 Modules and Frames

A Frame represents one physical PLM on the
network. A maximum of two Modules are contained
within each PLM Frame; these are referred to as
Module A and Module b. The number of Modules
shown in a given Frame is dependent upon the signal
processing configuration of that Frame.
Modules can be configured with the following
processing elements, either singly or in
combination:
▸ Classic Crossovers (Bessel, Butterworth,
Linkwitz-Riley)
▸ Linear Phase Crossovers
▸ Auxiliary Outputs.
The Dolby Lake Controller PLM Edition software is
also provided as standard with a PLM LoadLibrary
of Modules pre-configured for many well-known
models of loudspeaker.
Module file types available on the PLM are:
Notation*
1 1 Auxiliary Output
2 Classic 2-way crossover or 2 Auxiliary
outputs
2+1 Classic 2-way crossover + 1 Auxiliary
output
LP2 Linear Phase 2-way crossover + 1 Auxiliary
output
3 Classic 3-way crossover or 3 Auxiliary
outputs
3+1 Classic 3-way crossover + 1 Auxiliary
output
LP3 Linear Phase 3-way crossover
4 Classic 4-way crossover or 4 Auxiliary
outputs
LP4 Linear Phase 4-way crossover
5** Classic 5-way crossover or 5 Auxiliary
outputs (see Note)
6** Classic 6-way crossover or 6 Auxiliary
outputs (see Note)
Table 8.3: PLM Module file types
* designation as seen on DLC PLM Edition
Module display.
Description
sIGNAL FLOW AND PROCEssING 8
**Only partial implementation of these
Module types is possible within a single
PLM, as each PLM is limited to four outputs.
The Output Router of the processor can be
used to select which four Module outputs are routed
to the PLM power outputs. Further outputs can be
realized in other Frames using the Super Modules
feature.
The PLM's default configuration is 2 x 1-in/2-out,
using two Modules, Module A and Module b. Each
Module is configured as provide two auxiliary outputs,
providing a total of four outputs. It is important to
understand, though, the consequences of assigning
alternative configurations.
Example 1:
Reconfiguring Module A with a 3-way module file
(e.g. a Classic 3-way crossover) results in Module
A needing processing capacity for three output
channels. This leaves Module B similarly with
processing capacity for three output channels. The
total number of processed outputs remains six and
the PLM Frame will display two Modules.
Example 2:
Reconfiguring Module A with a 4-way module file
(Classic 4-way crossover) results in Module A needing
processing power for four outputs. To achieve this,
Module A requires additional processing for one
output channel from Module B. Module B therefore
is reduced to two outputs. The total number of
processed outputs remains six and the PLM Frame
will display two Modules. Module A as a 4-way and
Module B as either a 2-way or 2-Aux.
Detailed information relating to loading Module files
and subsequent manipulation of the Modules can
be found in the Dolby Lake Controller User Manual,
chapter 7.5.

8.3.1 LoadLibrary and Fingerprints

The DLC PLM Edition software differs from the
standard Dolby Lake Controller software in that
it incorporates an additional library of Modules,
specific to the PLM. Each of these Modules contains
information about the loudspeakers' electrical
characteristics in addition the standard Module data.
This PLM-specific library is called the LoadLibrary
and the data set for a particular speaker type is called
that type's fingerprint.
PLM Series Operation Manual 25