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Enabling PEQ block in SGTL5000

Question asked by Suresh B on Apr 2, 2019
Latest reply on Apr 12, 2019 by xiangjun.rong

Below configuration settings are done to enable PEQ in SGTL5000. 

DAP_CONTROL->DAP_EN = 1

DAP_PEQ->EN = 0x01

DAP_AUDIO_EQ->EN = 0x01

write the co-efficient registers for low pass filter with cut-off frequency 800Hz, [based on the attached "SGTL5000 PEQ design_12Jun2013_v3" sheet (set Cutoff Frequency FC = 800 Hz, set Sampling Frequency Fs= 8000Hz)]

DAP_FILTER_COEF_ACCESS->INDEX =0x01 

DAP_FILTER_COEF_ACCESS->WR=1

 

After doing the above configurations also we observe the frequency above 800Hz in the recorded file. 

 

Note: we are observing the frequency components in the recorded file by using Equalizer application (in Linux PC)

 

Please correct us if we are missing some configuration.

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