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- DPLAYER NEWS #9 March 1987
-
- SIDPLAYER FILE TYPES AND SELF-DISSOLVING LIBRARY FILES
-
- This documentation file explains the various types of song files, identified by
- the .MUS, .WDS, and .PIC filename extensions, as well as the self-dissolving
- library files identified by the .SAL, .PIL, and .WPL filename extensions. It
- also gives instructions on how to use the WPLMAKER utility to create
- self-dissolving library files.
-
- SIDPLAYER SONGS
- A Sidplayer music file is identified by a .MUS filename extension. To play a
- Sidplayer music file you need a song player program. The .MUS file contains
- only data and no code, so you cannot just LOAD and RUN or use SYS to hear the
- music. Existing players include KPLAY (with a piano keyboard display), MPLAY
- ("Multiplay" with autoplaying feature), Magic Sid Machine, SIDPIC, and the
- Enhanced Player.
-
- Sidplayer songs are created by the Sid Editor program published in the books
- "All About the Commodore 64, Volume Two" and "The Complete 64" (a book and disk
- combination) by COMPUTE! Books. The new Enhanced Editor, and the Enhanced
- Player, are published in "COMPUTE!'s Music System for the Commodore 128 and 64:
- The Enhanced Sidplayer." The Sid Editor programs and the Enhanced Player are
- copyrighted and are not in the Public Domain. See SIDNEWS #7 for more
- information about the Enhanced Sidplayer book.
-
- SINGALONG SONGS
- Singalong songs are songs which have an accompanying words file. The filename
- for the words file is the same as the filename for the music file, except that
- the .MUS filename extension is replaced with a .WDS extension. To play a
- Singalong song you need the Singalong player, the SIDPIC player, or the
- Enhanced Player program, and both the .MUS and .WDS files must be on the disk.
- The player will load the two files and play the music while displaying the
- words. You may also listen to just the music file of a Singalong song by using
- any of the regular song player programs.
-
- The words file for a Singalong song must be created by a special utility
- program to insure the correct file format. The utility program and
- instructions for creating Singalong songs can be found in the Enhanced
- Sidplayer book.
-
- SONGS WITH PICTURES
- Some songs have an accompanying picture file, identified by a .PIC filename
- extension. This is a full screen bitmap picture in Doodle or Koala format that
- is displayed while the music plays. The SIDPIC and Enhanced Player programs
- can accommodate picture files.
-
- As explained in the Enhanced Sidplayer book, a .PIC file can be created by
- simply renaming a Doodle or Koala format picture to the name of the music file
- but with the .PIC extension.
-
- SELF-DISSOLVING LIBRARY FILES
- Since a music file may also have a words or picture file or both, two or three
- separate files could have to be downloaded to get a complete song. For your
- downloading convenience, songs with words or a picture are available in a
- bundled format called a "library" file. You can download one library file for
- a song and then "dissolve" it into the separate files on your computer.
-
- A self-dissolving library file is one which does not require that you run a
- library utility program to dissolve the library file. You just LOAD the
- self-dissolving library file and then RUN it, and it writes the separate files
- to your disk. After the individual files have been written, you can scratch
- the library file. Because the self-dissolving library file is actually a
- program loaded into memory, you do not need to have the library file on the
- same disk that the separate files are written to.
-
- MUSIC AND WORDS (.SAL) LIBRARY FILES
- A file with the .SAL filename extension is a self-dissolving library file that
- consists of the music and words files for one Sidplayer song. Download the
- .SAL file and then LOAD and RUN it, and it will write the .MUS and .WDS files
- to your disk and then give you the option of scratching the .SAL file. Be sure
- to have as many free blocks on the disk as there are in the .SAL file before
- you dissolve the file.
-
- MUSIC AND PICTURE (.PIL) LIBRARY FILES
- A file with a .PIL extension consists of the music and picture files for one
- song. A simple data compression technique is used in the .PIL file to reduce
- the size of the picture data. The picture data is uncompressed to normal size
- when the .PIL file is dissolved. Because of the data compression, the two
- separate files may together take up more disk blocks than the .PIL file.
-
- MUSIC, WORDS, AND PICTURE (.WPL) LIBRARY FILES
- A file with a .WPL extension consists of the music, words, and picture files
- for one song. Again, data compression is used for the picture data.
-
- THE WPLMAKER UTILITY
- Use the WPLMAKER utility program to create a .SAL, .PIL, or .WPL file for a
- Sidplayer song. Just LOAD the program and RUN it, insert the disk with the
- song to be libraried, and enter the name of that song at the filename prompt.
- The program will first read the .MUS file for that song, then read the .WDS
- file if it exists, and finally read the .PIC file if it exists. The program
- will next prompt you to insert the destination disk and press any key, and then
- write the .SAL, .PIL, or .WPL file as appropriate.
-
- A words or picture file must exist in order to create a library file. If only
- a music file for the specified song is on the disk, the WPLMAKER program will
- print an error message and stop.
-
- If you are going to create several self-dissolving library files and you have a
- second disk drive as device number 9, change the statement DW=8 at the
- beginning of the WPLMAKER program to DW=9 and the library files will be written
- to the second drive.
-
- The WPLMAKER utility replaces the earlier SALMAKER and PILMAKER programs and
- should be used instead. The library files written by WPLMAKER contain the
- revised disk I/O routines with the improved error detection.
-