(11-09-2013, 04:06 AM)delroth Wrote: FWIW, does anyone know why Dolphin even outputs sound at 48KHz? DSP mixing is done at 32KHz on GameCube and Wii, maybe DTK audio can be 48KHz? Not sure.DSP output is 32KHz for nearly all retail/SDK apps, a couple of games (Aggressive Inline, BMX XXX) and some homebrew uses 48KHz. DTK audio is always 48KHz (48043 according to documentation), the hardware *may* support 32KHz but I haven't ever seen it used.
However the DAC is fixed at 48KHz, with a hardware resampler before it controlled by bit 6 (DSP) and bit 1 (DTK) of the AI control register. So I think before anyone jumps to any conclusions it would be best to record the output from the real hardware and use that for comparison rather than "pristine" audio from game files.