How to update PEQ parameters from MCU?
Hello,
I need to update gain, Q and frequency from MCU to PEQ. For gain I have a lookup table with 50 values, Q lookup table has 16 values and frequency lookup table has 50 values.
I guess I could use the filter coefficient calculator in SigmaStudio to calculate coefficients for every each option but that is lot of data to store into MCU (I have to do same thing for some LPF and HPF filters also). Is there a better way to do it? Like using lookup tables in DSP side?
Thanks,
Ari
Audio Signal Processors
parameter_update
mcu
SigmaDSP Audio Processors
adau1701
Hi Ari,
There are a number of ways to solve this problem:
Calculate the coefficients in your microcontroller
Generate tables of coefficients and store them in your microcontroller
Use an index-selectable filter (which stores the coefficients in the SigmaDSP, and uses an index to select the filter)
Options one and two are described here: https://ez.analog.com/docs/DOC-1819
The third option is briefly described here: https://ez.analog.com/message/35456#35456
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