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A Brief Timeline of Music Formats Audio Formats / Audio Storage Michael S. McDaniel.

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Presentation on theme: "A Brief Timeline of Music Formats Audio Formats / Audio Storage Michael S. McDaniel."— Presentation transcript:

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2 A Brief Timeline of Music Formats Audio Formats / Audio Storage Michael S. McDaniel

3 Analog vs. Digital  Analog is a continuous wave signal that varies in frequency and/or amplitude.  Sound is naturally in this form.

4 Analog vs. Digital  Digital is a signal that is composed of pulses of zeroes and ones.

5 Which is Which? AnalogDigital Reel-to-Reel Vinyl Record (LP) 8-Track Cassette CD MP3 WMA FLAC DVD Audio

6 (1946 - ?) Reel-to-Reel Works like a cassette (magnetic tape is transferred from one reel to the other)Works like a cassette (magnetic tape is transferred from one reel to the other) Developed by Mullin, an audio engineer who was in WW2Developed by Mullin, an audio engineer who was in WW2 Used extensively in music recordingUsed extensively in music recording Not portableNot portable

7 (1948 – ?) Vinyl Record The primary technology used for personal music reproduction for most of the 20th centuryThe primary technology used for personal music reproduction for most of the 20th century A flat disk with a groove, played on a turntable by a needleA flat disk with a groove, played on a turntable by a needle Came in different sizes (speeds) – 45’s, 78’s, 33 1/3Came in different sizes (speeds) – 45’s, 78’s, 33 1/3 Not portableNot portable Still being produced todayStill being produced today

8 (1963 – ?) Cassette A contained reel-to-reel formatA contained reel-to-reel format Magnetic tape that goes across a head that reads the signalMagnetic tape that goes across a head that reads the signal Popular due to its size and portabilityPopular due to its size and portability Still being produced todayStill being produced today

9 (1964–1980) 8-Track Tape “Endless” reel-to-reel cassette“Endless” reel-to-reel cassette Magnetic tape that goes across a head that reads the signalMagnetic tape that goes across a head that reads the signal Popular from the mid-60’s to the early 80’sPopular from the mid-60’s to the early 80’s

10 (1982 - ?) Compact Disc Digital format!Digital format! It is “optical media” : A laser burns dots into a plastic disk.It is “optical media” : A laser burns dots into a plastic disk. Those dots are either open or closed (1’s or 0’s)Those dots are either open or closed (1’s or 0’s) Most popular format used today.Most popular format used today. Very portable and inexpensive.Very portable and inexpensive.

11 Optical Disk Capacities vs. MP3 Players

12 MP3 Players Mp3 Players like the iPod have taken over. They are much more easily accessible Available online through providers like iTunes from Apple THE PROBLEM The RIAA (Recording Industry Association of America) has been making public the problem of copyright infringement prevalent among mp3 users. RIAA

13 Any Questions?


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