CS560 MP3 Project

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CS560 MP3 Project

• Teenagers Group

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Stakeholders - Teens

• Most use CD players
• Most use the internet
• Many have CD burners and create their own mix
  CDs
• Physically Active

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Interviews

• Sam
• Marsha
• Dan

(names changed)
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Interview - Sam

• Listens to CDs at home before and after bed and
  while doing chores.
• Creates his own CDs with parents PC
• Regular computer and internet user
• Wanted lots of songs available - the more the
  better

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Sams Camera

• Sam is accustomed to using peripheral devices
• Sam is comfortable with USB interface

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Interview - Marsha

• Listens to a variety of types of music
• Listens to music mostly while driving
• Not very familiar with MP3 devices
• Doesnt like the way CDs skip while driving
• Confused by locking feature on her CD player
• CD player doesnt fit in girls pant pockets

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Marshas CD Player

• Familiar with CD player interface

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Interview - Dan

• Gets a lot of music off the internet and creates
  his own CDs
• Owns MP3 player but doesnt use it very often
  (uses CD player instead)
• Wouldnt want to deal with complexity of having
  hundreds of songs on one device

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Dans CD Burning Software

• Dan is comfortable with transferring music files
  from his PC to an external device.

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Requirements

• Small enough to fit in pocket
• Low weight
• Hold several CDs worth of songs
• Interface similar to CD player
• Menu system that allows user to manage a large
  number of songs
• Cool look

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Early Designs

• Stylish
• CD/MP3
• PDA
• Headphones

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Stylish

• Modern look
• Not sure if arrow buttons are intuitive
• Limited menu on small screen

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CD / MP3

• Large screen
• Familiar interface
• Detachable memory-based player
• Doesnt address problem of CD players being too
  big

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PDA

• PDA look (not functionality)
• Large screen for menu
• Not sure if metaphor is right for teens

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Headphone / Wristband

• Player fits into special headphones or wristband
• Enhanced portability
• Not sure how to use menu while player is on
  headphones

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Design Decisions
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Design Decisions (cont)
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Final Design
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Final Design Justification

• Small enough to fit in pocket
• Low weight
• Hold several CDs worth of songs
• Buttons similar to CD player
• Playlists make song management easier and are
  like CDs
• Looks pretty cool

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Prototype

• Turn player on, find song, play it
• Lock buttons
• Unlock and exit menu
• Turn down volume
• Pause song
• Find song while listening to another

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Usability Evaluators
(names changed)
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Usability Test Results
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Ideas For Redesign

• More obvious on switch
• Better button arrangement
• Playlists available from main menu
• Separate select button

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On Switch

• Users found this hard to find
• Make this more visible or as a button

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Button Arrangement

• Users got menu up/down confused with volume
  up/down
• Move volume over

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Playlist Menu

• In original design, Browse Songs went to a list
  of all songs
• Should go to the playlist menu

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Separate Select Button

• Some users didnt know that our play button was
  also the menu select button.
• A separate button might more usable, or if the
  play button were bigger and stood out more

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What We Learned

• Important to design for target audience, not
  ourselves
• Users are surprising
• Teamwork and communication