Abstract: The perceptibility of high-resolution versus CD standard audio has been the subject of research and debate since the introduction of hi-res audio distribution formats twenty years ago. The author conducted an extensive survey to determine whether experienced listeners using their ownb systems could differentiate between a diverse set of twenty native high-resolution PCM stereo recordings and downconversions of the same masters in Red Book spec. Over 450 responses were received from professional audio engineers, experienced audiophiles, casual music enthusiasts, and novices. The online survey submissions show that high-resolution audio was undetectable by a substantial majority of the respondents regardless of experience level, equipment cost, or process with almost 25% choosing “No Choice.”. However, some evidence exists that specific genres and recordings produced marginally higher positives.