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level_multiplier

README.md

Level Multiplier Architecture

This directory contains the Level Multiplier component.

Overview

Applies simple digital gain/attenuation (multiplication) to an audio signal stream.

Configuration and Scripts

  • Kconfig: Enables the Level multiplier component (COMP_LEVEL_MULTIPLIER). This applies a configured fixed gain to an audio stream, typically to increase capture sensitivity of voice applications compared to media capture.
  • CMakeLists.txt: Manages local base sources and optimized implementations (level_multiplier-generic.c, level_multiplier-hifi3.c, level_multiplier-hifi5.c). Includes the IPC version 4 wrapper (level_multiplier-ipc4.c) when CONFIG_IPC_MAJOR_4 is present, and supports llext.
  • level_multiplier.toml: Holds topology module entry parameters including UUIDs, standard pin layouts, and mod_cfg limits.
  • Topology (.conf): tools/topology/topology2/include/components/level_multiplier.conf configures the level_multiplier widget object. It specifies num_input_pins and num_output_pins mapping and defaults to type effect with UUID 56:74:39:30:61:46:44:46:97:e5:39:a9:e5:ab:17:78.