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Sound SituationFormats and Foundations
Cassette Tapes
• Introduced by the Music Industry
Cassette Tapes
• Introduced by the Music Industry
• Thin plastic ‘tape’ wound on to a spindle
Cassette Tapes
• Introduced by the Music Industry
• Thin plastic ‘tape’ wound on to a spindle
• Tape is layered with Ferric Oxide.
Cassette Tapes• Exposed to a magnetic field
Cassette Tapes• Exposed to a magnetic field
• 2 Key features of cassettes:
Cassette Tapes• Exposed to a magnetic field
• 2 Key features of cassettes:
• 1) can record material to the tape
Cassette Tapes• Exposed to a magnetic field
• 2 Key features of cassettes:
• 1) can record material to the tape
• 2) can easily erase the tape and re-record.
Compact Disc• Plastic Disk 4 1/100’s of an inch thick
Label
Acrylic
Aluminum
Plastic Base Material
Compact Disc• Plastic Disk 4 1/100’s of an inch thick
• Coated with Aluminum
Label
Acrylic
Aluminum
Plastic Base Material
Compact Disc• Plastic Disk 4 1/100’s of an inch thick
• Coated with Aluminum
• Continuous spiral of bumps underneath
Label
Acrylic
Aluminum
Plastic Base Material
Compact Disc• Plastic Disk 4 1/100’s of an inch thick
• Coated with Aluminum
• Continuous spiral of bumps underneath
• Single track of continuous data.
Label
Acrylic
Aluminum
Plastic Base Material
Compact Disc
• Information is written and read in a spiral
Compact Disc
• Information is written and read in a spiral
• Allows for CD’s of all sizes to be created.
CD Player Components
CD Player Components
• Drive Motor – spins the disc 200-500 x/sec
CD Player Components
• Drive Motor – spins the disc 200-500 x/sec
• Laser Lens – focuses on bumps and reads
CD Player Components
• Drive Motor – spins the disc 200-500 x/sec
• Laser Lens – focuses on bumps and reads
• Tracking Mechanism – moves the laser
CD Player Components
• Drive Motor – spins the disc 200-500 x/sec
• Laser Lens – focuses on bumps and reads
• Tracking Mechanism – moves the laser
• Must be able to track the bumpy spiral.
Digital Storage
• WAV – Waveform audio (uncompressed)
Digital Storage
• WAV – Waveform audio (uncompressed)• Similar in sound and size to CD Files
Digital Storage
• WAV – Waveform audio (uncompressed)• Similar in sound and size to CD Files• MPEG3 – Compressed audio format
Digital Storage
• WAV – Waveform audio (uncompressed)• Similar in sound and size to CD Files• MPEG3 – Compressed audio format• Created by Motion Picture Experts Group
Digital Storage
• WAV – Waveform audio (uncompressed)• Similar in sound and size to CD Files• MPEG3 – Compressed audio format• Created by Motion Picture Experts Group• First format driven by consumers
Digital Storage
• WAV – Waveform audio (uncompressed)• Similar in sound and size to CD Files• MPEG3 – Compressed audio format• Created by Motion Picture Experts Group• First format driven by consumers• CD song uses and average of 40 MB
Digital Storage
• WAV – Waveform audio (uncompressed)• Similar in sound and size to CD Files• MPEG3 – Compressed audio format• Created by Motion Picture Experts Group• First format driven by consumers• CD song uses and average of 40 MB• MP3 version of song would use 4 MB
Digital Storage
• WAV – Waveform audio (uncompressed)• Similar in sound and size to CD Files• MPEG3 – Compressed audio format• Created by Motion Picture Experts Group• First format driven by consumers• CD song uses and average of 40 MB• MP3 version of song would use 4 MB• Some CD’s have ability to read MP3.
Understanding MP3
• Re-saved = re-compressed
Understanding MP3
• Re-saved = re-compressed
• Loses quality
Understanding MP3
• Re-saved = re-compressed
• Loses quality
• Carries information in META Tags (ID3)
Understanding MP3
• Re-saved = re-compressed
• Loses quality
• Carries information in META Tags (ID3)
• Imbeds info on artist, title, album art
Understanding MP3
• Re-saved = re-compressed
• Loses quality
• Carries information in META Tags (ID3)
• Imbeds info on artist, title, album art
• Info can be displayed on screens
Understanding MP3
• Re-saved = re-compressed
• Loses quality
• Carries information in META Tags (ID3)
• Imbeds info on artist, title, album art
• Info can be displayed on screens
• Can search to restore lost info.
MP3 Players
• 1998 – first MP3 player introduced
MP3 Players
• 1998 – first MP3 player introduced
• Could store and play MP3
MP3 Players
• 1998 – first MP3 player introduced
• Could store and play MP3
• No moving parts - Solid State Memory
MP3 Players
• 1998 – first MP3 player introduced
• Could store and play MP3
• No moving parts - Solid State Memory
• Microprocessor inside.
MP3 Players
• Various Forms today
MP3 Players
• Various Forms today
• Flash Memory
MP3 Players
• Various Forms today
• Flash Memory
• Smaller storage, no moving parts
MP3 Players
• Various Forms today
• Flash Memory
• Smaller storage, no moving parts
• Better for jogging and active people
MP3 Players
• Various Forms today
• Flash Memory
• Smaller storage, no moving parts
• Better for jogging and active people
• Hard Drive Players (iPod)
MP3 Players
• Various Forms today
• Flash Memory
• Smaller storage, no moving parts
• Better for jogging and active people
• Hard Drive Players (iPod)
• Moving Parts
MP3 Players
• Various Forms today
• Flash Memory
• Smaller storage, no moving parts
• Better for jogging and active people
• Hard Drive Players (iPod)
• Moving Parts
• More fragile
MP3 Players
• Various Forms today
• Flash Memory
• Smaller storage, no moving parts
• Better for jogging and active people
• Hard Drive Players (iPod)
• Moving Parts
• More fragile
• Larger storage capacity
