Archimago wrote: 
> Thanks for the note flimflam.
> 
> I can't speak for XP since I don't have a machine with it installed any
> more. True, these days with Win8, DirectSound will always dither as far
> as I can tell, so will never be exactly bit perfect. I would not use
> DirectSound in the 16-bit setting since lack of bit perfection is easily
> demonstrated, but based on what I see, 24-bit setting seems OK. The
> dithering in the lowest bit usually is below the noise floor of DACs
> (since there's no DAC that actually can demonstrate 24-bit resolution -
> the best is around 21/22 bits).
> 
> Not sure what else you feel gets mixed in there if we're only playing a
> single audio stream... Of course, one must also make sure the music is
> the same sample rate as the DirectSound setting otherwise it gets
> resampled.

What level were your test signals?


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