Hi DustOn,

if you don't have any luck with minim and ess (I'm pretty sure you should be able to), you could try the following example which uses Beads (http://www.beadsproject.net). Recording is not that well tested, but it can definitely be done. If you want direct access to the Sample data instead of writing it then that's possible too.

Code:

import beads.*;

void setup() {
  try {   
      final AudioContext ac = new AudioContext();
      float ms = 1000; // this is how long the sample will be 
      //(note, there are options for recording into variable length samples)
      final Sample s = new Sample(ac.getAudioFormat(), ms); //this is the sample
      Recorder r = new Recorder(ac, s); //this records sound into the sample
      ac.out.addDependent(r); //must plug recorder into signal chain
      
      //now make the sound you want to make (e.g., this is a sine wave)
      WavePlayer wp = new WavePlayer(ac, 500f, Buffer.SINE);
      //make sure to send the sound to the recorder
      r.addInput(wp);
      
      //when the recorder gets to the end of the sample, it gets killed off, so
      //this code runs a callback for when this happens
      //(you could choose another way of ending the recording)
      r.setKillListener(new Bead() {
        public void messageReceived(Bead message) {
          //stop the audio system and write the file
           ac.stop();
           System.out.println("done");
           try {
             s.write("snd.aif");   //save the file somewhere useful
           } catch(Exception e) {
              e.printStackTrace(); 
           }
        }
      });
      
      //this runs the system in non-realtime
      ac.runNonRealTime();
  } catch(Exception e) {
       e.printStackTrace(); 
  }
  
}
 

Hi DustOn,

maybe I didn't understand what you want to do. In the example, an empty Sample is generated. The Record class is used to record generated sound into the Sample, which is then saved in a file called "snd.aif" (because it's a relative path it gets saved in the same directory as the Processing app). Perhaps this isn't what you want to do as you're talking about creating a waveform from a sound file. Not sure.

Ollie

hi,

i'm also looking for a audio analysis of an audio file, befor playing it.
i will get the beat's in the track, on a timeline.
in realtime i can get the beat's 99%, but only when play the audio file or get an audio input. but i will get thew beat's befor i start the audio file.

is it possible to analyze an audio file?? without playing it??

regards maik

Enhansing Quality of Waveforms using Waveform Quick-load
If the Waveform drawings you are getting don't look very good, you can turn off Waveform Quick-load. This will cause Transana to rebuild the graphic portion of the Waveform each time a new waveform is called for rather than using a saved waveform diagram.