* Main task: Tracks-database-Traktor

1) Directory & file structure - "DIR"
2) ORG database - "ORG" 
3) Traktor NML file - "NML"

1-2-3 linked by filename + directory


*** Part 1: DIR
  -------------
  
  - current: wav  
    /year/Author - Title (version).wav
    /year/v_Author - Title (version).wav

  - current: mp3, m4a
    /1mp3/Author - Title (version).mp3
    /1mp3/Author - Title (version).year.mp3
    /1m4a/Author - Title (version).m4a
    /1m4a/Author - Title (version).year.m4a

  - example: http://hpac.rwth-aachen.de/teaching/sem-ell-18/tracks-sample.txt

  - TODO: 
    /year/prefix_Author* - Title* (version*).ext
  
    separator between Author and Title: " - "
    separator between Title and version: " ("
    separator between version and extension: ")."
  
    - mp3 & m4a: CHANGE DIRECTORY when possible
  
    - prefix_: either empty or "v_" (= vynil)
  
    - Author*: shorter version of Author 
      - NEW FILENAME!
      - no "feat", "ft", "presents", "pres", "with", "introduce"  / replace with special symbol
        Steal Vybe ft Alexis Simmons - Selene -> 
        Steal Vybe_- Selene
      - if filename too long: possible cut at "&" and "vs"
        Djaimin & Oliver P & Barbara Tucker ->
        Djaimin & Oliver P &_-
  
    - Title*: shorter version of Title
      - NEW FILENAME!
      - no parenthesis in the title 
        Freaks - The Creeps (You're Giving Me) (Justin Robertson Remix).wav ->
        Freaks - The Creeps_(Justin Robertson Remix).wav
  
      - if filename "too long"
        1) title to initials: 
           If Everybody In The World Loved Everybody In The World (Original).wav -> 
           IEITWLWITW (Original).wav
        2) cut + symbol
           If Everybody In The World Loved Everybody In The World (Original).wav -> 
           If Everybody_(Original).wav
        3) ???
  
    - Version*: shorter version of Version
      - NEW FILENAME!
      - no parenthesis in the version
        Space Cowboy - Crazy Talk (Pique & Nique (You Will Miss Me Remix)) ->
        Space Cowboy - Crazy Talk (Pique & Nique _)       
      - (Special Danny Krivit Extended Re-edit 12" Mix).wav ->
        (Special_Mix).wav      [Mix|Remix|Version]
  
    - "too long" = 64? 80?
  
  - TODO: if filename renamed and filename.jpg 
    -> rename filename.jpg too!  
  
  - TODO: if filename (and dir) renamed
    -> NO INFORMATION LOST! -> change ORG and NML
  
  - TODO: check for errors (duplicates)!!!



*** Part 2: ORG
  -------------
  
  - for each track in DIR -> one entry in ORG 
  
    ORG: Header + Properties 
    Header: filename
    Properties (fields):  Author, (Author+), Title, (Title+), Version, (Version +), year
    Ignore other properties (Notes, Release, format, extension, ...)
  
  - Are there files in DIR which are not in ORG?
    -> create ORG entry; make sure it's unique
  
  - Files in DIR with corresponding entry in ORG -> update/complete
  
  - Are the entries in ORG consistent with the files in DIR?
    Check info - report errors!
    Do the ORG entries actually exist? Suggestions?
    Does the year match the directory?
  
  - Example: http://hpac.rwth-aachen.de/teaching/sem-ell-18/tracks.org



*** Part 3: "NML"
  ---------------
  
  - <COLLECTION>
    <ENTRY> ... </ENTRY>
    ...
    <ENTRY> ... </ENTRY>
    </COLLECTION>
  
    <ENTRY MODIFIED_DATE="2012/11/12" MODIFIED_TIME="65326" AUDIO_ID="AbQ7uqu7u7uqu7u8zMzMzMzMzMzO7+/+7t7u7+7u/t7u3e7u7+7dzMzMzv7u7u7u7t7u7e7t7u7t3u7e7u3d3d3N3u7u7v7u7u7u3u7t7u7u7u7u7u7u7u3szdzM2pmamZzd7d7d7t3d7u7u7t7u7v3u7u/+7t7u66qqqqve7u7v+6qqqqrO7u7t3e3d7t6nt6iZje7d3e7u7t3u/+7u3u7u7u7u7YqYqLe+7u7u7szMzczMzM3u3u7u7e3d7u3Mu+7t3Ly93u67q7u6qrqpZmZmZnZmZmZmMiIhERESIiIiMiIzMzMzMzMzMzMzMzMzMzNDMyIiIhERERERAAAAAA==" TITLE="Hold On" ARTIST="95 North ft Sabrynaah Pope">
    <LOCATION DIR="/:Waves/:1994/:" FILE="95 North ft Sabrynaah Pope - Hold On (Louie's King Street Dub).wav" VOLUME="PDJ EXT HD1" VOLUMEID="PDJ EXT HD1"></LOCATION>
    <INFO BITRATE="1411200" COMMENT="Acapella; H:hard; xHD " MIX="Louie's King Street Dub" PLAYCOUNT="9" PLAYTIME="436" IMPORT_DATE="2010/10/15" LAST_PLAYED="2014/3/4" RELEASE_DATE="1994/1/1" FILESIZE="75232"></INFO>
    <TEMPO BPM_TRANSIENTCOHERENCE="123.025002" BPM="123.025002" BPM_QUALITY="100"></TEMPO>
    <LOUDNESS PERCEIVED_DB="-0.520533919"></LOUDNESS>
    <CUE_V2 NAME="AutoGrid" DISPL_ORDER="0" TYPE="4" START="207.10145062074042" LEN="0" REPEATS="-1" HOTCUE="0"></CUE_V2>
    <CUE_V2 NAME="n.n." DISPL_ORDER="0" TYPE="5" START="15813.685284688963" LEN="7803.2919170341111" REPEATS="-1" HOTCUE="1"></CUE_V2>
    </ENTRY>

  - Example: http://hpac.rwth-aachen.de/teaching/sem-ell-18/collection.nml

  - If entry in ORG does not exist in NML -> nothing to do
  
  - if entry in ORG is in NML: check/update
  
  - TITLE, ARTIST, DIR, FILE, MIX
  
  - Are the entries in NML consistent with ORG (and DIR)?
  
  - PLAYLISTS, NODE, PLAYLIST, FOLDER, PRIMARYKEY ... -> update!


*** Objectives
  - clarity
  - (document/visualize the actions)
  - extensibility/customization
  - programmability? 
    we want to assess the language





* Secondary tasks:

  1) Spectrogram
     - libraries
     - real time
     - visualization
  
  2) Stone-grid (2,3,4 players)
     - logic (not strategy)
     - multi-player
     - visualization
  
  3) Ray-tracing algorithm
     - computation
     - objects
     - NOT visualization
  
  4) Chess re-player/analyzer