Alcorn Mcbride AM-4, Hardware And Software Reference Manual

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18 Controlling the AM-4
Select File
Description: This command causes the AM-4 Digital Audio Machine to select the specified audio
track or Play List on the currently selected media. Once this command is sent, the
next Play command causes the specified file to play from the beginning. The unit
defaults to file #1 at power-up, unless an autoexec file exists. When receiving this
command, the AM-4 Digital Audio Machine always looks for the file on the currently
selected drive.
Command Bytes: nSE<CR> or nnSE<CR> or nnnSE<CR>
where n, nn, or nnn is the file number in ASCII.
Message Response: R<CR>
Comments: This is similar to the “Search to Address” command in chapter addressing mode used
in Pioneer Laser Disc protocol. The maximum file number is 511.
Examples: Select file 215. 215SE<CR>
Select file 4. 4SE<CR>
Play
Description: This command causes the AM-4 Digital Audio Machine to play the file which was
specified with the “Select File” command. If a track is paused, this command resumes
play. If this command is issued while a Play List is being played, the AM-4 Digital
Audio Machine will skip to the next track in the Play List and play it. This command
sends a response when it is executed, and another when the playback is complete.
Command bytes: PL<CR>
Message Response: R<CR>
Completion Response: <CR>
Loop Play
Description: This command causes the AM-4 Digital Audio Machine to play the file specified by
the Select File command and loop back to the beginning. If the file is a Play List, all
of the tracks in the Play List will be played and then the entire Play List will restart.
Command bytes: LP<CR>
Message Response: R<CR>
Play File
Description: This command is the same as the Play command, except the file number or name is
specified as part of the command so no prior Select File command is required.
Command bytes: nPL<CR>
Where n is the file number or name (surrounded in quotes).
Example: 3PL<CR> plays file number 3.
Example: “bark.mp3”PL<CR> plays the file named “bark.mp3”
Message Response: R<CR>
Completion Response: <CR>