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An example of how unmatched volume levels can invalidate an audio comparison

The BBC Radio 4 programme "You and Yours" yesterday did a piece on high-resolution sound in which they asked 2 recording industry professionals to identify 44.1kHz/16 bit and 96kHz/24 bit music extracts:

As you can hear everyone got it wrong in a 'blind' test, but after the programme the presenter admitted that the volumes had not been matched.

The attachment is a low-resolution MP3 but you can download a high-resolution version from the BBC website to see if you can tell the difference.
 
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