User Manual

www.redbackaudio.com.au Redback® Proudly Made In Australia 11
Redback® A 4270/80 Four Zone Paging PA Amplier
15.0 ALERT, EVACUATION and CHIME MP3 FILES and ALERT and EVAC VOICE OVER MESSAGES
The supplied MIcro SD card houses all the MP3 audio les used for the output tones. These les are stored in ve separate
folders (see gure 5) and relate to the corresponding output. e.g. the Alert folder houses the MP3 le to be played when
the Alert mode is triggered.
These les can be any length and bit rate, but must be in MP3 format (they cannot be Wav les or AAC les).
Note 1: MP3 les should have the following specications for optimum performance. 128kbps, 44.1kHz, 32bit, VBR or CBR,
Stereo (even better as mono).
Note 2: only one MP3 le can be in each folder.
There is also a folder labelled “#LIBRARY# which contains a host of sample MP3 les.
The “Voice” folder contains the MP3 audio les played as the Alert and Evacuation messages. There are separate folders
for both the Alert and Evacuation messages as shown in gure 11.
The messages have to be recordered in MP3 format using any readily available PC software or other means, and then
transferred to these folders.
Activating the Voice Over Message:
Voice over messages become active when an MP3 le is present in the relevant folder. If the voice over message is not
required leave the folder empty.
Fig 11
16.0 INSTALLING MP3 FILES
You will rst need to remove power from the amplier then remove the Micro SD card from the rear of the unit.
To remove the Micro SD card push the card in and it will eject itself.
In order to access the program, the Micro SD card will need to be connected to a PC. You will need a PC or laptop equipped
with an Micro SD card reader to do this. If a Micro SD slot is not available then the Altronics D 0371A USB Memory Card
Reader or similar would be suitable (not supplied).
Step by step guide to installing an MP3 onto the Micro SD card with a Windows installed PC
Make sure the PC is on and card reader connected and correctly installed. Then insert the SD card into the reader.
Go to “My Computer” or “This PC” and open the SD card which is usually marked “Removable disk”.
In this case it is named “Removable disk (O:) as shown in gure 12.