https://openjdk.java.net/ 
public interface com.sun.media.sound.ModelChannelMixer extends javax.sound.midi.MidiChannel
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.media.sound.ModelChannelMixer
  super_class: java.lang.Object
{
  public abstract boolean process(float[][], int, int);
    descriptor: ([[FII)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      buffer  
      offset  
      len     

  public abstract void stop();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "ModelChannelMixer.java"