Advertisement
do not work). Repeat this process for the required triggers.
Note: More than one MP3 file can be placed in the trigger folders. These will be played randomly while the trigger is acti-
vated.
2.2 MP3 file format
The audio files used must be in MP3 format, they cannot be WAV, OGG or other formats. The minimum recommended
MP3 format is 128kbps, 44.1kHz, 32bit, VBR or CBR, Stereo (even better as mono).
NOTE: the MP3 files used cannot be "Read only". To check this, right click on the MP3 file and scroll down and select
Properties, you will get a popup window. Make sure the "Read Only" box has no tick in it.
2.3 Alert and Evac Messages
A message can be inserted every three alert cycles and/or every three evac cycles . A Voice message could be something
like "please evacuate the building". To install an Alert or Evac message open the "voice" folder and then select the alert
or evac folder. Figure 5 illustrates the location of the voice/evac folder.
Delete the file in the folder and replace it with an MP3 message file you want to play when you activate the alert or evac.
This MP3 could be a file from the #library# folder or an MP3 of your own choosing.
Note: If an Alert or Evac message is not required delete the files in these folders.
3.0 Play modes
Alternate: When the A 1720C is in Alternate mode (DIP switch 1 OFF) (see Fig 1) a momentary closing contact or pulse
on the trigger pins will activate the associated trigger folder MP3. The A 1720C will continue to play the MP3 until it fin-
ishes and will then stop playing. If the contact is held closed continually the MP3 will continue to loop over and over, or if
there are multiple MP3 files in the trigger folder, they will be played randomly until the contact is released.
www.redbackaudio.com.au
Redback® A 1720C MP3 Tone Generator
Fig 4
Fig 5
Redback® Proudly Made In Australia
3
Advertisement
