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STM32F4-Discovery Audio_playback_and_record Project

Question asked by spin on Apr 23, 2012
I'm trying to test the Audio_playback_and_record Project in the STM32F4-Discovery board, but even if I use the bin file included in the fw package(V1.1.0), the audio quality of the digital mems microphone is very poor.
I want to know if there's a problem of my board or there's something in the firmware that I don't understand.
Thanks for all,