まだ途中ですよ

player.pde

import ddf.minim.analysis.*;
import ddf.minim.*;

Minim minim;
AudioPlayer in;

int time;
int waveH;

String stringName = "test";
String audioName = "bara.mp3";

void setup(){
  
  size(1024,600);
  minim = new Minim(this);
  minim.debugOn();
  
  in = minim.loadFile(audioName);
  in.loop();
   
  textFont(createFont("Cochin.ttc", 100));
  
  time = 0;
  waveH = 280;
}

void draw(){
  
  background(240);
  fill(128);
  text(in.left.get(100), width/3, height/2+45);
  
  fill(244, 179, 194);
  stroke(244, 179, 194);
  for(int i = 0; i < in.bufferSize() - 1; i++){    
    ellipse(i*2, 300 + in.left.get(i)*waveH, 3, 3);
  }
  fill(128);
  text(width, 100, 100);
  text(mouseX, 100, 200);
  text(mouseX/1024.0 , 100, 300);
  text(mouseX/1024.0*in.length(), 100, 400);
}

void keyReleased(){
  if (key == 'p') {
    in.play(int(mouseX/1024.0*in.length()));

  }
}

void stop(){
  in.close();
  minim.stop();
  
  super.stop();
}

prove.pde

import ddf.minim.analysis.*;
import ddf.minim.*;

Minim minim;
AudioInput in;
AudioRecorder recorder;

int time;
int waveH;

String stringName = "test";

void setup(){
  
  size(1024,600);
  minim = new Minim(this);
  minim.debugOn();
  
  in = minim.getLineIn(Minim.MONO, 512);
  recorder = minim.createRecorder(in, stringName + ".wav", true);
   
  textFont(createFont("Cochin.ttc", 100));
  
  time = 0;
  waveH = 280;
  recorder.beginRecord();
}

void draw(){
  
  background(240);
  fill(128);
  text(in.left.get(100), width/3, height/2+45);
  
  fill(244, 179, 194);
  stroke(244, 179, 194);
  for(int i = 0; i < in.bufferSize() - 1; i++){    
    ellipse(i*2, 300 + in.left.get(i)*waveH, 3, 3);
    //point(i, 200 + in.left.get(i)*waveH);
    //line(i, 300 + in.left.get(i)*280, i+1, 300 + in.left.get(i+1)*280);
    //line(i, 20 + in.left.get(i)*30, i+1, 20 + in.left.get(i+1)*30);
  }
  
}

void keyReleased(){
  if (key == 's') {
    recorder.endRecord();
    recorder.save();   
  }
}

void stop(){
  in.close();
  minim.stop();
  
  super.stop();
}