Wegener Communications 6420 user manual File Selection Keywords, Sequential

iPump 6420 User’s Manual

3.4.5.File Selection Keywords

File selection keywords give the user the ability to play files in “random” order. These are typically used in temporary inserts ordered by Compel commands. However, they can be used as file specs in loop-forever playlist plays, a permanent Decoder (port) setting. The “keyword” signals to the playback process a method to select an audio file from a specified i6420 asset folder, whether top level, or deep in the directory tree. The keywords apply to the file path description, whether in a discrete file play command, or in a single file spec (line item) of a larger playlist. In the path syntax, they literally take the place of a discrete file name. Each keyword assumes that some memory of previous plays is retained. However, this memory is non-volatile, and is not retained through unit resets.

As of this writing, three (3) keyword selectors are defined, SHUFFLE, RANDOM, and

SEQUENTIAL:

1.SHUFFLE: This keyword means that all files in a directory are each played once, without any repeats, as file insert requests, using this keyword, are made. When all files have played, then the order in the directory is re-shuffled and a new file play order is remembered. The only exception is that the last file from the previous shuffle is not the first in the next, if there is more than one file in the directory. This continues for all file plays called for a particular Decoder (port), until the unit resets or the directory has files added or removed. So the remembered state is: Ordered file list, current position in list, applicable Decoder, and the type of call (from discrete file play, a file spec in a std. playlist, or file spec in a LOA playlist [used for ShowShifting or Time

Zone Delay, see sections 3.7.2 & 3.7.3]).

2.RANDOM: This keyword means that a file is randomly selected from a directory as file insert requests, using this keyword, are made. If there is more than one playable file in the directory, then no file is repeated, through repeated requests. This continues for all file plays called for a particular Decoder (port), until the unit resets. So the remembered state is: Last file played, applicable Decoder, and the type of call (from discrete file play, a file spec in a std. playlist, or file spec in a LOA playlist [used for ShowShifting or Time Zone Delay, see sections 3.7.2 & 3.7.3]).

3.SEQUENTIAL: This keyword means that all files in a directory are each played once, without any repeats, in alphanumeric order, as file insert requests, using this keyword, are made. When all files have played, then it repeats in the same order. This continues for all file plays called for a particular Decoder (port), until the unit resets or the directory has files added or removed. So the remembered state is:

Alphanumeric file list, current position in list, applicable Decoder, and the type of call (from discrete file play, a file spec in a std. playlist, or file spec in a LOA playlist

[used for ShowShifting or Time Zone Delay, see sections 3.7.2 & 3.7.3]).

As files are added or deleted from the target folders, the behavior of the unit is this: As files are added, then the new files are “picked up” each time SHUFFLE or SEQUENTIAL finishes the current file list and starts again. As files are deleted, the keywords would skip those file positions in their lists, if any.

An example of the use of the SHUFFLE keyword is given in Figure 3-18.

There are no relevant user controls for this automatic process, beyond use of these keywords in the standard file and playlist play commands.

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