- CONFIG_INTEL_DMIC_FIR_DECIMATE_BY_2¶
FIR decimate by 2
Type: bool
Help¶
This includes FIR coefficients to decimate by 2 into the build. It
is commonly used for 48 kHz capture with 2.4 MHz microphone clock.
Decimate by 2 in FIR gives good bandwidth vs. Nyquist and narrow
transition region due to lower FIR order need compared to higher
decimation factors.
Direct dependencies¶
INTEL_DMIC && SOF
(Includes any dependencies from ifs and menus.)
Default¶
n
Symbols that select this symbol¶
Kconfig definition¶
At /home/nashif/zephyrproject/modules/audio/sof/zephyr/../src/drivers/intel/Kconfig:94
Included via Kconfig:8 → Kconfig.zephyr:23 → modules/Kconfig:6 → doc/_build/Kconfig/Kconfig.modules:14 → /home/nashif/zephyrproject/modules/audio/sof/zephyr/Kconfig:2 → /home/nashif/zephyrproject/modules/audio/sof/zephyr/../Kconfig.sof:124 → /home/nashif/zephyrproject/modules/audio/sof/zephyr/../src/Kconfig:7 → /home/nashif/zephyrproject/modules/audio/sof/zephyr/../src/drivers/Kconfig:5
Menu path: (Top) → Modules → sof (/home/nashif/zephyrproject/modules/audio/sof) → Drivers → Intel DMIC driver → Decimation factors
config INTEL_DMIC_FIR_DECIMATE_BY_2
bool "FIR decimate by 2" if INTEL_DMIC_FIR_CUSTOM
default n
depends on INTEL_DMIC && SOF
help
This includes FIR coefficients to decimate by 2 into the build. It
is commonly used for 48 kHz capture with 2.4 MHz microphone clock.
Decimate by 2 in FIR gives good bandwidth vs. Nyquist and narrow
transition region due to lower FIR order need compared to higher
decimation factors.
(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)