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I2S microphone, sample rate

Question asked by g.marat on Aug 1, 2016
I use an example from CubeMX - Audio_playback_and_record. He works at STM32F4-Discovery board - playing and recording a sound (wav-file). 
By default the sound recording goes with sampling rate of 16000 Hz, but I want to reduce frequency to 8000 Hz. Prompt please how to make it?