SOUND QUALITY 2: DIGITAL BOOGALOO Andrew Justice University of North Texas http://youtu.be/YF0Si5JNH9E Uncompressed Lossless Lossy (raw) Compression Compression Waveform Audio File Apple Lossless Audio Advanced Audio Format (WAV) Codec (ALAC / MP4) Coding (AAC) Audio Interchange Free Lossless Audio MPEG-2 Audio Layer File Format (AIFF) Codec (FLAC) III (MP3) Resource Shorten (SHN) Ogg Vorbis Interchange File Format (RIFF): Windows Media bitstream method for Windows Media Audio (WMA) storing data in chunks Lossless (WMA Lossless) Key: bitrate. Ben Folds: “Zak and Sara” (2001) WAV MP3 @ 192kbps MP3 @ 64 kbps Daft Punk: “Give Life Back to Music” (2013) WAV MP3 @ 192kbps MP3 @ 64kbps Beyoncé: “Freakum Dress” (2006) AAC @ 256kbps MP3 @ 64kbps Sibelius: Symphony No. 1, III. Scherzo (Minnesota Orchestra / Vänskä, 2013) WAV MP3 @ 192kbps MP3 @ 64kbps John Coltrane: “Moment’s Notice” (1957 / 1997 remaster) WAV MP3 @ 192kbps MP3 @ 64kbps WHAT ABOUT ONLINE SERVICES? AAC (lossy) Ogg Vorbis (lossy) AAC+ (lossy) AAC (lossy) Bitrate: 64-128 mono, ~96: Normal quality on Web: 64 free & 192 for 128-384 stereo, 196-512 mobile subscribers Dependent on Dolby 5.1 Internet connection ~160: Standard quality All in-home devices play “High quality uploads on desktop & web 128 audio; mobile Broadband: 128 for creators with player, high quality on devices receive a variety (CD) enterprise quality mobile of different rates DSL: 64 (near CD) internet connections” ~320 (Premium): High depending on the capability of the device Extremely dependent quality on desktop, Dial-up: 20 (FM) & network but never upon the uploader extreme quality on mobile more than 64 Daft Punk: “Give Life Back to Music” (2013) WAV AIFF (uncompressed) 24-bit / 88 kHz Pono: FLAC (lossless), 24-bit / 192kHz THANK YOU! [email protected].