0

Play 5.1 stereo through EM100

jawa

March 29, 2011 22:51

None

Follow

I can't find any support for EM100 in BrightAuthor ! Is there a way to play 5.1 Stereo decoded to separate channels through the analog outputs on a EM100 1 and trigger the start with a contact closure Alternatively 3 stereo audiofiles in perfect sync. Cheers // JW

• Facebook
• Twitter
• LinkedIn

5 comments

• 0
  
  RokuLyndon March 30, 2011 06:15

  
  
  There isn't currently a setting in brightauthor for the expander.
  
  But, even if there was, you can't play 5.1 to analog outputs on the compacts because they do not decode ac3, they just pass ac3 through.
  
  Yes, you can play 3 audio files. You might need to pad the start times to get them in sync. This would have to be done using a custom script. Is it 3mp3s in sync, or audio in the video, plus two separate audio files?
  
• 0
  
  jawa April 01, 2011 20:07

  
  
  OK thanks,
  
  I want to play 3 stereo mp3 files in sync each on a separate output in the EM100 expander. Also need GPIO input to trigger play in loop and stop.
  can you help me with a script ?
  
  jawa
  
• 0
  
  RokuLyndon April 01, 2011 20:35

  
  
  Is it the same gpio to start and stop?
  Is the gpio you want to use also going to be connected to the expander?
  
• 0
  
  RokuLyndon April 01, 2011 20:41

  
  
  Try this script. It plays three audio files, and uses gpio 1 to start and stop playback.
  
  debug=true
a1=createobject("roAudioPlayer")
a2=createobject("roAudioPlayer")
a3=createobject("roAudioPlayer")
gpio=createobject("roGpioControlPort")

p=createobject("roMessagePort")
a1.SetPort(p)
'a2.SetPort(p)
'a3.SetPort(p)
gpio.SetPort(p)
gpio.EnableInput(1) 'using gpio 1 on the brightsign
stopped=false

rem video mode
mode=createobject("roVideoMode")
mode.SetMode("1360x768x60p")

REM Settings
a2.SetAudioOutput(0)
a2.MapStereoOutput(3) 'expander 3
a2.SetAudioOutput(0)
a2.MapStereoOutput(1) 'expander 1
a3.SetAudioOutput(0)
a3.MapStereoOutput(2) 'expander 2

Start:
a1.PlayFile("2.mp3")
a2.PlayFile("2.mp3")
a3.PlayFile("3.mp3")

listen:
msg = wait(0,p)

if type(msg) = "roAudioEvent" then
if msg.GetInt() = 8 then
'a2.Stop()
'a3.Stop()
goto start
endif

else if type(msg) = "roGpioButton" then

if stopped then
stopped=false
goto start
else
stopped=true
a1.stop()
a2.stop()
a3.stop()
endif

endif

goto listen

  
• 0
  
  jawa April 05, 2011 22:01

  
  
  Thanks,
  
  This partly works, the 3 files starts and stops almost the same time...
  I've created 3 stereo mp3 files with exactly (to the sample) the same length and different padding with silence at start/end to handle the different delays when starting playback.
  The problem I still have is when I start/stop playback with GPI the delay between Audio 1, 2 and 3 varies slightly every time, from 0 to a few hundred mS. Same thing if I leave it in loop playback for a longer time, each time the loop restarts the delay varies for each audio output every time.
  
  Is there any way to predict or control what the delays are going to be, or is there an other/better approach to the application
  
  Files are mp3, joint stereo, 44,1 kHz, 320Mbps
  
  your help is much appreciated
  
  // jawa