2017-09-01 11:12 PM
Hello, I am trying to store sound wave using analog mic using stm32f4 discovery board. external mic--> adc-->dac-->codec--->headphone.
When I am trying to play recorded sound using codec, I am not able to hear recorded sound . can any one help me?
Note: this post was migrated and contained many threaded conversations, some content may be missing.2017-09-08 12:31 AM
hello ,
I have connected ADC pin to ground but 5.4khz,4,5khz and 2.5khz frequency component is present in my output.
sampling frequency=48khz, and different cutoff frequency coefficient I have used, but noise is present.
I am using CMSIS lib function for LPF (arm_fir_f32) . I have generated frequency coefficient using matlab.
2017-09-08 12:33 AM
cutoff frequency that I have used are 1khz,2,khz,3khz,4khz and 5khz.but there is no change in my output.