APPENDIX. THE LIST OF DESIGN FEATURES

Few windows (simple navigation)

Search criteria

• search by lyrics / era / substring of title / album / composer / lyricist / origin

Entering search conditions

• from a menu or list / from an adjusting list (type-ahead) / by typing
• names can appear in either order

Search method

• search list appearing after entering of one attribute / all attributes / arbitrary combination of attributes
• possibility to enter multiple choices for one attribute

Manipulation of search list

• manual selection / subset selection for given duration / selection of given number of songs / selection of most popular songs / selection of all songs in list
• possibility to sort the list
• possibility to gather selections together
• possibility to expand and collapse hierarchies
• fast sampling of songs

Presentation of search list

• selected songs highlighted / selected songs marked with checkmark / separate list of selected songs (for transfer into playlist)
• as strings on a line / as a list with fields in columns / as a static hierarchical structure / as a dynamic hierarchical structure
• duration of each song visible
• duration of selection visible

Handling of search and play lists

• separate search and play list
• several lists open simultaneously
• searching possible while music is playing

Transfer from search list to play list

• by pressing a button / drag and drop / by clicking or doubleclicking

Manipulation of play list

• possibility to shuffle the play list / to remove songs from playlist / to move songs to new positions in the playlist / to name and store the playlist / to clear the playlist
• played songs removed automatically

Presentation of play list

• duration of each song visible
• current song shown separately
• costs visible

Control of play

• start by using a button / by doubleclicking / by a menu command
• extensive / simple (easy to use)
• automatic repetition of play
• random play

Visualization

• display of CD cover
• play list as personal CD
• play mode as CD player

Error messages

• user generated errors not possible / as standard error messages / as synthesized speech / as non-speech audio

Miscellaneous

• possibility to name and store the state of the system
• expandability to other media
• additional information about songs available
• lyrics visible