RXC-3080
Hardware Installation and User Guide
9000-0000-042 Revision 06
43 of 45
Genave Electronics
ADPCM Audio Player
How Sound Files Are Played To The PA
Port
When the RXC-3080 runs a script, if it has been told
to play a song/sound file, it turns on the ADPCM player and tells the player the file number of the
song/sound it is to play. The player automatically selects the file from the TF card and begins playing.
At the same time, the RXC-3080 un-mutes the corresponding audio amplifiers and the external PA
amplifier circuits.
How The RXC-3080 Knows What Songs To Play
Each song or sound file in the TF card has a specific address. The address starts at 0000.ad4 and can go
to 0100.ad4. The very first song file (0000.ad4) is never used. It is simply a place holder in the TF card.
Here is how the memory in the TF card looks like to the RXC-3080:
0000.ad4
Empty file, never used
0001.ad4
Song #1 (first useable file)
0002.ad4
Song #2
0003.ad4
Song #3
etc.........
0100.ad4
Song #100 (last useable file)
When the RXC-3080 runs a script, if the text “Play 0006;” is in the script, the RXC-3080 will
command the ADPCM unit to play song #6. There are two ways that the song will end or stop. The first
way is for the ADPCM to come to the end of the song, at which time it will tell the RXC-3080 that the
song is done. The second way is for a new script to have the text “Play 0000;” the RXC-3080 will
command the ADPCM module to stop all play functions.
Adjusting Audio Levels
The output level is adjusted using dedicated pot, R5, on the module. Begin playing the audio file and
adjust to the appropriate level.
Creating ADPCM Files From .wav, Etc...
The ADPCM audio player can only play files that are compressed into a 4 bit ADPCM format (.ad4).
Genave supplies a program that converts files from .wav formats into the .ad4 format. Please contact
Genave for more information on the conversion program.
R5 VOL
