garym wrote: > Only one. Then again I rarely have any reason to do tests on my audio > stuff. Purchased the Benchmark DAC I years ago. Initially did a single > blind comparison (friend in other room knew which was connected) with > the DAC output (connected to mid-line Dell laptop (XP) via S/PDIF) > compared to the output of the line out of the built in laptop sound > card. I recall almost 100% ability to detect which was which. Basically > line out of Sound card had lots of "tells". > > Fast forward to squeezebox acquisitions. Did Benchmark sound different > than Squeezebox internal DACs? Results reported earlier: No ability to > reliably detect. Also, as reported, no ability to reliably detect CD > player vs Squeezeboxes. Never bothered comparing my turntable setup > (which I still enjoy using now and again). > > But what does my specific tests on a limited set of devices have to do > with recognition that a vast body of scientific research recognizes that > human beings often make biased (and surprising) choices/judgements when > doing sighted tests (i.e., have knowledge of experimental treatment). > That was my only point. So we really can't judge (nor can you) how sensitive your testing is at differentiating audio devices - yes you heard a difference ONCE between DAC & line out of computer (in a not very "carefully controlled & not double blind test"). Yet you seem to put great "faith" in this method to sort out differences - "I'm a strong believer in listening tests. Of course if they are not carefully constructed double-blind tests, then they are essentially worthless. (And outside of the audiophile world this statement is not the least bit controversial.)"
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