Minim Errors - How to detect no playback device (speakers/headphones) and avoid errors?

batroost

Hi,

I have a Processing2 application that works fine on my PC. When I tried it on a spare machine I got multiple Minim errors. This appears to be because the spare machine (Windows7) has no Speakers or Headphones plugged-in i.e. no playback device. When I plug in headphones all of the errors disappear and the code runs as normal.

Does anyone know of a simple way to detect the lack of playback device from within the code? I could then use this to skip the sound-related commands for any machine that has no sound.

Many thanks,

Batroost

GoToLoop

Maybe you should check whether some Minim related variable got null? :-/
http://processing.org/reference/null.html

batroost

Yes, that would help. The errors in the console start with:

==== JavaSound Minim Error ====
==== Unable to return a SourceDataLine: unsupported format - PCM_SIGNED 44100.0 Hz, 16 bit, mono, 2 bytes/frame, little-endian

So, I'm guessing that this is the one I need to trap. Not sure where to go from here?

batroost

Fixed it - thanks for the hint. Simply used the following before the loading the sounds, and check the flag HasSound before allowing teh code to play any sound:

  minim = new Minim(this);  
  // Check for sound output channel
  AudioOutput out = minim.getLineOut();
  if (out==null) {
    HasSound=false;
    println("No Sound Channel Detected, Sounds Disabled.");
  }
  else { 
  // Sound Output Channel Exists so Initialise Sounds
  HasSound=true;

etc...