Lab.gruppen PLM series Operation Manual

Also see for PLM 10000Q: Supplementary guide User manual addendum Specifications Quick start Technical data

Contents

Lab.gruppen PLM series Operation Manual Manual pdf 36 page image

30Signal Flow and Lake ProcessingPLM Series Operation Manual rev 1.1.9The Lake Processing system provides two distinct categories of crossovers:▸ Infinite Impulse Response filters (IIR) such as the classic Bessel, Butterworth or Linkwitz-Riley types;these are available with slopes ranging from 6 dB/octave to 48 dB/octave.▸ Finite Impulse Response filters (FIR) providing zero phase shift with steep transition slopes at thecrossover frequencies. These are also referred to as Linear Phase Crossovers.Further details on these types of crossovers and information on configuring various module types can befound in the Lake Controller Operation Manual.6.5 Files and PresetsThe Lake system provides various methods for storing and recalling Module, Frame, or system-wide data. Aoverview is provided below; for further information please refer to the Lake Controller Operation Manual.6.5.1 Module, System and Sub-System Configuration FilesModule, System and Sub-System Configuration files are stored on the Lake Controller PC, and data ispassed across the network when recalling or storing these type of files.▸ A Module file is the smallest set of data that can be stored and recalled; it contains crossover, gain,delay, and limiter information for an individual loudspeaker. A Module file may be recalled into otherLake devices. It is not possible to store a Module File directly on the hardware device.▸ A System or Sub-System Configuration File contains a set of Module file information in addition toFrame related information such as I/O routing, along with Group control information.6.5.2 Frame and System PresetsThis device allows the complete processor configuration to be stored as a Frame Preset on the hardwareunit itself. Presets can be recalled via the front panel (please refer section 7.11.7) to or via the Lake Controllersoftware (please refer to the Lake Controller Operation Manual.A maximum of 100 Frame Presets can be stored on this device. The data within a Frame Preset includes theconfigurations of both Modules in the Frame, including all levels, crossover, EQ, input mixer, output routing,and all other Module, Frame and Group parameters. As Frame Presets are stored in the device, completeprocessor configurations may be recalled without the need to connect the device to a PC.Using the System Presets function in the Lake Controller, entire system configurations can be stored andrecalled across a network of LM 26, PLM, Mesa Quad EQ, Contour Pro 26, and Dolby Lake Processors. Thisenables fast retrieval and switching of entire system configurations as minimal data is being sent betweenthe Controller and Processors.