I have a problem with additional frequency at source signal sample frequency.
I have tried to playback constant frequency signal (100Hz, 500Hz, 1KHz) generated by a software and transmitted via i2s to tlv320aic3101.
At the sample rate of 48KHz (NCODEC = 1) i have no problems.
But at 8KHz sampling rate (and at 16KHz) i hear additional frequncy, it is closer to sampling frequency. (generated frequency i also can hear and it is ok)
It seems like digital interpolation filter act only as copy-paster, but not as filter with fs/2 cutoff.
Is there some settings to enable cut-off filter?
I have MCLK =12.24MHz; PLL P = 1, R = 1, J=1, D= 4;
NDAC=NADC=6
fs=8KHz
