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.Wav playout using STM32F4 via uSDcard

Question asked by mukund.akshaya on Mar 7, 2012
I tried wave playout using the normal mode i.e. through Flash memory and the AUDIO_MAL_MODE_NORMAL, this worked fine.
However when I try playout via uSDCard I find that the output is very noisy and defnitely corrupted.

The readme file says that for playout via an external device the AUDIO_MAL_MODE_CIRCULAR should be used which would require implementation of certain functions such as the EVAL_AUDIO_TransferComplete_CallBack(). Has anyone tried this ?

At present my playout is implemented using two ping pong buffers but I think there must be some access timing delays that lead to the poor quality of output. Any ideas anyone ?