For the ultimate test, I use the album EQUINOX. It was recorded in 24/192 and is available in a 24bit 192khz ( AIF or .WAV) version from SoundKeeper Recordings. It was just recognized as ( Feb 2011) Recording of the Month by Stereophile Magazine. For lesser DACs, Soundkeeper offers the recording in 24/96 ( AIF or WAV ); also a 24/96 on DVD-R requiring no special player. A great sounding recording. ( So well recorded and produced it even sounds good in CD format too). A Must Have
"(Music + recording + playback electronics + ear + brain) = complex problem" Mark Dodd British loudspeaker designer.