Posted on September 11, 2015 at 18:30Hi,
I'm trying to write an application to do simultaneous record and play on the STM32F4Discovery board. (16 KHz, 2 Channel, 16-bits). The audio quality on the speaker is not good in this case.
Thereafter, I tried to do this sequentially instead of simultaneously. I first record into a 40960 bytes buffer and then play from that buffer. The sequence is:
BSP_AUDIO_IN_Init()
BSP_AUDIO_IN_Record()
// Record Samples
BSP_AUDIO_IN_Stop()
BSP_AUDIO_OUT_Init()
BSP_AUDIO_OUT_Play()
// Play the same buffer
BSP_AUDIO_OUT_Stop()
This sequence runs correctly for the first time and I'm able to hear the recorded audio correctly. But when I run this in a loop for the second time, the audio is highly distorted. I can barely make out what was spoken during recording.
Could you please advise on anything that I might be doing wrong.
thanks,
Ngupta
#stm32f4discovery-audio
