WASAPI gives me this error in fb2k. Default settings. Win 7 64. FiiO E7 USB DAC with TI PCM2706 USB receiver.
It works fine when I play 16 / 44.1 stuff but anything else and it just complains.
you will probably need to put a resampler in your DSP chain to change the sample rate of that file to something your Fiio can play (44.1)