Musicians and music lovers have long been lamenting the loss of depth in compressed music files. That may have something to do with a growl-like tone that can result by low quality, compressed files, he said. "Interestingly, 'angry' was relatively unaffected by MP3 compression," Mo added. That means a trumpet solo in a John Coltrane recording may lose some of its zippiness, but maintain its more mellow, negative overtones. When audio of those sounds are compressed to form an MP3 file - a common digital music file - these characteristics are changed, and some are lost. "According to our results, MP3 compression strengthened neutral and negative emotional characteristics, and weakened positive emotional characteristics in musical instrument sounds," Ron Mo of the Department of Computer Science and Engineering, Hong Kong University of Science and Technology told Seeker in an email.Īs Mo and his coauthors explain, musical instrument sounds have distinct timbre, or emotional characteristics. In a nutshell, moody, mysterious and negative tones persist, while positive, "happier" tones are the ones that get trimmed.
Do you like being able to carry an entire library of music on your phone? There's a price to pay for that convenience in sound quality, say engineers, and a new study has identified just what characteristics of music you miss out on by listening to compressed music files.
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