Alcorn Mcbride AM-4, Hardware And Software Reference Manual

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File Types and Storage 47
File Name Description
SND00000.MP3 Track number 0 MP3 Audio file
SND00004.WAV Track number 4 WAV Audio file
PLY00002.LST Play List Number 2
BARKING.MP3 Track Name “BARKING” Audio file
SHOW1.LST Play List Name “SHOW1”
SCHEDULE.SCL The file used for real-time clock scheduled play.
PLY00000.GPS GPS Playlist Number 0.
Play List Files
Play Lists provide a mechanism for the AM-4 Digital Audio Machine to
automatically play a collection of tracks in a predefined sequence. Play Lists often
allow the AM-4 Digital Audio Machine to be used to perform complex functions that
would normally require an external controller. Play Lists can perform functions as
simple as looping a single track, or as complex as user prompted pacing of the
playback.
Overview
A playlist zero
(PLY00000.LST) will
play on boot-up.
A Play List file contains a list of commands which are identical to those that
would be issued through the serial port.
These commands are usually play
commands which cause the AM-4 to play audio tracks (or other Play Lists) on the
media. When a Play List is being used, the commands are processed in the order in
which they appear in the list. The Play List is an ASCII text file and can be made
using any ASCII text editor (like notepad or DOS edit) or using the Playlist Builder
program available from http://www.alcorn.com/support/software.html. The
maximum Play List file size is 64 KBytes.
A Play List can be started by serial or parallel commands, in exactly the same way as
an audio track. For example, the serial message
2PL<CR>
causes Play List PLY00002.LST on the currently selected drive to start. Discrete File
Select Input 2 will also start PLY00002.LST.
If Play List 0 (PLY00000.LST ) exists, it will be automatically executed on power
up.
If a Play List contains a command to play the number or name of another Play List,
execution of the current Play List will be terminated at that point, and the new Play
List will begin.