Audio Loop Processing.org (Java/Minim sound Library)

Question

我正在尝试创建一个长的音频片段，它是一个录制的音频片段的集合，这些音频片段最终被合并成一个巨大的声音拼贴。我正在使用Minim声音库，但目前我很难让它发挥作用。这与我的编程技能相当基本，但我认为这将是一项非常容易的任务！我：希望它能像Minim的examples文件夹中的"RecordAndPlayback"一样工作，但让点击触发的事件自动完成。

这是我迄今为止的代码：

import ddf.minim.*;
Minim minim;
AudioInput in;
AudioRecorder recorder;
AudioPlayer player;
Timer timer;
class Timer {
  int savedTime; // When Timer started
  int totalTime; // How long Timer should last
  Timer(int tempTotalTime) {
    totalTime = tempTotalTime;
  }
  // Starting the timer
   void start() {
    // When the timer starts it stores the current time in milliseconds.
    savedTime = millis();
  }
  // The function isFinished() returns true if 5,000 ms have passed.
  // The work of the timer is farmed out to this method.
  boolean isFinished() {
    // Check how much time has passed
    int passedTime = millis()- savedTime;
    if (passedTime > totalTime) {
      return true;
    } else {
      return false;
    }
  }
}
void setup()
{
  size(512, 200, P3D);
  textMode(SCREEN); 
  minim = new Minim(this);
  timer = new Timer(5000);
  timer.start();
  in = minim.getLineIn(Minim.STEREO, 2048);
  recorder = minim.createRecorder(in, "myrecording.wav", true);
  textFont(createFont("Arial", 12));
}
void draw()
{
  background(0);
  player =  minim.loadFile("myrecording.wav");
  player.play();
  player.loop();
//GUI
  stroke(255);
  for(int i = 0; i < in.left.size()-1; i++)
  {
    line(i, 50 + in.left.get(i)*50, i+1, 50 + in.left.get(i+1)*50);
    line(i, 150 + in.right.get(i)*50, i+1, 150 + in.right.get(i+1)*50);
  }
  //-- end of GUI
//recorder switching
  if (timer.isFinished())
  {
    text("not..", 5, 15);
    if(recorder.isRecording() == true){
     recorder.endRecord();
     recorder.save();
     timer.start();
    }
  }else
  {
    text("recording...", 5, 15);
    recorder.beginRecord();
   println(recorder.isRecording());
  }
  ///--- end recorder switching
}
void stop()
{
  // always close Minim audio classes when you are done with them
  in.close();
  if ( player != null )
  {
    player.close();
  }
  minim.stop();
  super.stop();
}

请提供任何帮助都将非常受欢迎，因为这让我抓狂！

感谢

Daniel

Answer 1

您似乎只处理一个文件，并且没有加载您正在录制的内容。

如果你想打开和关闭录制，你可以使用布尔值来跟踪，然后保存录制的内容。

以下是使用修改后的示例的基本草图：

import ddf.minim.*;
Minim minim;
AudioInput in;
AudioRecorder recorder;
AudioPlayer player;
boolean isRecording;//are we recording ?
void setup(){
  size(512, 200);
  minim = new Minim(this);
  in = minim.getLineIn(Minim.STEREO, 512);
  recorder = minim.createRecorder(in, "rec.wav", true);
  textFont(createFont("Arial", 12));
}
void draw(){
  background(isRecording ? color(192,0,0) : color(0));
  stroke(255);
  for(int i = 0; i < in.left.size()-1; i++){
  line(i, 50 + in.left.get(i)*50, i+1, 50 + in.left.get(i+1)*50);
  line(i, 150 + in.right.get(i)*50, i+1, 150 + in.right.get(i+1)*50);
  }
  if ( recorder.isRecording() ) text("Currently recording...", 5, 15);
  else                          text("Not recording.", 5, 15);
}
void keyReleased(){
  if ( key == 'r' ){
    isRecording = !isRecording;//toggle recording
    if(isRecording){//if we need to record
      if(player != null &&  player.isPlaying()) player.pause();//stop any previously playing tracks, if any
      if(recorder.isRecording()) recorder.endRecord();//and the previous recording somehow wasn't ended, end it now
      recorder.beginRecord();//begin recording, according to docs: "If recording was previously halted, and save() was not called, samples will be appended to the end of the material recorded so far."
    }else recorder.endRecord();//stop recording
  }
  if ( key == 's' ){
    if(recorder != null) {
      recorder.save();
      println("Done saving ");
      player = minim.loadFile("rec.wav", 2048);
      player.play();
    }
  }
} 
void stop(){
  in.close();
  minim.stop();
  super.stop();
}

如果出于某种原因，您想将每个录制保存到一个单独的文件中，而不是一个文件中，则可以使用一些整数来保存录制的id和播放样本。

import ddf.minim.*;
Minim minim;
AudioInput in;
AudioRecorder recorder;
AudioPlayer player;
boolean isRecording;
int recID = -1;
int playID = 0;
void setup(){
  size(512, 200);
  minim = new Minim(this);
  in = minim.getLineIn(Minim.STEREO, 512);
  textFont(createFont("Arial", 12));
}
void draw(){
  background(0);
  stroke(255);
  for(int i = 0; i < in.left.size()-1; i++){
  line(i, 50 + in.left.get(i)*50, i+1, 50 + in.left.get(i+1)*50);
  line(i, 150 + in.right.get(i)*50, i+1, 150 + in.right.get(i+1)*50);
  }
  if(recorder != null){
    if ( recorder.isRecording() ) text("Currently recording...", 5, 15);
    else                          text("Not recording.", 5, 15);
  }
  if(player != null && !isRecording){
    println("playing: " + playID); 
    if(player.position() >= player.length()){
      if(playID < recID){
        playID++;
        player = minim.loadFile("rec"+playID+".wav", 2048);
        player.play();
      }
    }
  }
}
void keyReleased(){
  if ( key == 'r' ){
    if(recorder != null && recorder.isRecording()) recorder.endRecord();
    else{
    recID++;
    recorder = minim.createRecorder(in, "rec"+recID+".wav", true);
    recorder.beginRecord();
    }
    isRecording = true;
  }
  if ( key == 's' ){
    if(recorder != null) {
      recorder.save();
      println("Done saving " + recID);
      player = minim.loadFile("rec"+recID+".wav", 2048);
      player.play();
      isRecording = false;
    }
  }
  if ( key == 'p' ){//play all
    playID = 0;
    player = minim.loadFile("rec"+playID+".wav", 2048);
    player.play();
  }
}
void stop(){
  in.close();
  minim.stop();
  super.stop();
}

祝你好运！