Guys why the argument about audio quality the question was about using an SDXC card. Plain and simple flac is able to proudce higher frequencies. Uncompressed WAV, which is the same as a CDFS, will contain upto 20kHz, high quality mp3 will maybe get 16 or 18kHz because of the compression. A violin or cymbals has sounds way beyond what an mp3 is capable of, but will be heard with flac or wav. While flac is still compressed it IS better than any mp3. In either format higher frequencies can be reproduced with say a, harmonizer or by changing the phase . Like my audio receiver has some type of "filter" to help reproduce what is lost with compressed audio but will never be the same as the original. Any modern headphones and headphone ouput are able to produce the higher spectrum of frequencies, including the Droid 3.
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