Last night did it of cource it may be have low perciton
First sampling changed to 9950 hz and sample to 128
It make 63 value frequency and then by a ton genrate determin lower and upper frequency in per band and then get average of all freqency that in per band and set that average value for central frequency
Now i have 6 bands
125
250
500
1000
2000
4000
Tonight i want to convert adc to dB by regression and then wieghted to dBA
It may be have some error but i must study it and see do have meaningful diffrence with dB of sound level meter or not