Specifications

Char Meaning
L Loop next track. The track loops until the Resume input is activated or a serial
play command is received, whereupon the next entry in the Play List is played.
W Wait. Play stops at the end of current track until the Resume input is activated
or a serial play command is received, whereupon the next entry in the Play List
is played.
U Uninterruptible. Causes the Digital Audio Machine to ignore the Resume input
and serial Play command while playing. It still processes them when waiting,
paused or stilled.
I Interruptible. Allows the Resume input or serial Play command to skip to the
next track. This is the power-up default.
< Repeat entire Play List. The only way to stop the Play List from looping is to
use the Stop input or serial command, or to start another file. Anything in the
Play List after the ‘<’ character is ignored.
; Comment. Ignore all characters until the next carriage return.
Commands may be entered into the Play List in either upper or lower case. All text
following a semicolon (;) is interpreted as comments, until the next carriage return.
You may put anything you want in comments, including the special command
characters normally used in the Play List.
File Select inputs and
serial Play command
change functions when
using a Play List.
When the Digital Audio Machine is processing a Play List, reactivating the same File Selec
t
inputs or sending the serial play command take on different meanings, depending upon
whether the unit is playing, paused, or waiting. Here is how they behave:
Mode Interruptible Uninterruptible
Playing Immediately play next file Ignored
Paused Resume play Resume play
Waiting Play next file Play next file
Asserting and releasing the Pause input while the unit is in the Waiting state of a
Play List will also resume play.
One thing to be cautious of is the unintended endless loop. For example, if a Play List
contains a U followed by an L command, it doesn’t matter how many more tracks
may occur in it, there is no way to get to them! When using the U command, always
include an I command before the next L, unless this is the desired behavior. Of
course, you can always terminate the loop with a stop command, or by selecting a
different file.
Play Lists may contain references to other Play Lists, but as soon as such a reference
is encountered the new Play List begins execution, and the old one is abandoned.