# Problem mapping audio to different output device

**URL:** <https://discourse.processing.org/t/problem-mapping-audio-to-different-output-device/22663>\
**Category:** Libraries\
**Created:** [July 16, 2020, 2:22pm UTC](https://discourse.processing.org/t/problem-mapping-audio-to-different-output-device/22663 "2020-07-16T14:22:13Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![chickman](https://avatars.discourse-cdn.com/v4/letter/c/57b2e6/32.png) [@chickman](https://discourse.processing.org/u/chickman)\
**Post date:** [July 16, 2020, 2:22pm UTC](https://discourse.processing.org/t/problem-mapping-audio-to-different-output-device/22663/1 "2020-07-16T14:22:13Z")

</div>

Hey guys,  
I’m trying to play audio files to a different sound card connected to my laptop. I attached my code below. I keep getting the following error when attempting to write to the sound card (I do this through line " zone.outputDevice(1); ")

**javax.sound.sampled.LineUnavailableException: line with format PCM\_SIGNED 44100.0 Hz, 16 bit, stereo, 4 bytes/frame, little-endian not supported.**  
\*\* at com.sun.media.sound.DirectAudioDevice$DirectDL.implOpen(DirectAudioDevice.java:513)\*\*  
\*\* at com.sun.media.sound.AbstractDataLine.open(AbstractDataLine.java:121)\*\*  
\*\* at com.jsyn.devices.javasound.JavaSoundAudioDevice$JavaSoundInputStream.start(Unknown Source)\*\*  
\*\* at com.jsyn.engine.SynthesisEngine$EngineThread.run(Unknown Source)\*\*

This error is caused by “zone.outputDevice(1)” as when I comment that line out, the code runs and audio plays through my laptop speakers.

The line “Sound.list()” outputs the following.

```auto
device id 0: Primary Sound Driver
  max inputs : 0
  max outputs: 2 (default)
device id 1: Speakers (USB PnP Sound Device)
  max inputs : 0
  max outputs: 2
device id 2: Speakers (Realtek(R) Audio)
  max inputs : 0
  max outputs: 2
device id 3: Primary Sound Capture Driver
  max inputs : 2 (default)
  max outputs: 0
device id 4: Microphone (USB PnP Sound Devic
  max inputs : 2
  max outputs: 0
device id 5: Microphone Array (Intel® Smart
  max inputs : 2
  max outputs: 0
device id 6: Port Speakers (USB PnP Sound Device)
  max inputs : 0
  max outputs: 0
device id 7: Port Speakers (Realtek(R) Audio)
  max inputs : 0
  max outputs: 0
device id 8: Port Microphone Array (Intel® Smart
  max inputs : 0
  max outputs: 0
device id 9: Port Microphone (USB PnP Sound Devic
  max inputs : 0
  max outputs: 0

```

```auto
import processing.sound.*;
Sound zone = new Sound(this);

void setup(){

frameRate(20);
size(1200, 500); 
fill(255,255,255);
rect(0,0,width,height);

Sound.list();
}
void draw(){
  
  for (int i = 0; i < 2; i++){
    playTone(i);
    delay(2000); 
  }
  
}

void playTone(int index){
  zone.outputDevice(1);
  SoundFile file = new 
  SoundFile(this,"welcome.wav");
  file.amp(0.1);
  file.play();

}

```

I am just trying to play audio through the alternative sound card. Could anybody with some expertise with this sound library give me a hand? I have been struggling with this for days now. Thank you!