Java Sound: devices found when run in IntelliJ, but not in SBT

Question

I\'m trying to to use Java Sound API in a Scala SBT-managed project.

Here is a toy app that plays a note.

import javax.sound.midi._

object MyMain ex         


        

Answer 1

SBT runs your application in-process, with some classloader magic, which probably prevents MidiSystem from finding (using SPI) the sound components.

You can try forking a new JVM to run your application: fork in run := true. See Forking in the documentation.

Note that:

• by default it does not redirect input to the application. You can add that with:

  connectInput in run := true
  

• the forked JVM can be killed by any external tool without problem (using kill or any kind of task manager)