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| README.md | ||
| dcblock_build_blob.m | ||
| dcblock_get_abi.m | ||
| dcblock_plot_stepfn.m | ||
| dcblock_plot_transferfn.m | ||
| example_dcblock.m | ||
README.md
DC Blocking Filter Control Bytes Generator
This is a tool to generate the topology control bytes file (.m4) and configuration files used by sof-ctl. See example_dcblock.m for reference on how to use it.
The tools need GNU Octave version 4.0.0 or later with octave-signal package.
dcblock_build_blob.m
This script takes an array of floating point coefficients and the endianness. Returns a blob used to configure the binary controls of the DC Blocking Filter component.
The blob can be passed to alsactl_write(), blob_write(), tplg_write() to generate a CSV text, binary and topology file respectively.
dcblock_plot_transferfn.m
This script takes the R coefficient and the sampling frequency to plot the Frequency Response of the DCB filter H(z) = (1-1/z)/(1-R/z).
dcblock_plot_stepfn.m
This script takes the R coefficient and the sampling frequency to plot the Step Response of the DCB filter. It is useful to visualize how the DC component of a signal reacts to the filter.