Processing 1.0 - Processing Discourse - Minim

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Index › Programming Questions & Help › Sound, Music Libraries › Minim - getLineIn and OSX

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Minim - getLineIn and OSX (Read 2042 times)

hndrsn

Minim - getLineIn and OSX
Nov 5^th, 2009, 5:37am

Hey folks,

Have been playing around with the minim library, and encountered a problem about trying to use an external microphone with getLineIn. It seems that OSX 10.4 (maybe leopard etc do this too) defaults to built-in microphone when trying to access line-in in minim. I found an earlier post from May 09 about this issue which was left unresolved - I was wondering if anyone knows of a work around since then other than having to use Sonia?

Thanks in advance!

Here's the code (based on a minim lib example) I've been using:

Code:

import ddf.minim.*;
Minim minim;
AudioInput in;

void setup() {
  size(500, 500);

  smooth();
  
  minim = new Minim(this);
  
  minim = new Minim(this);
  minim.debugOn();
  
  in = minim.getLineIn(Minim.STEREO, 512);

}
void draw() {
  background(0);

  stroke(255);
  strokeWeight(1);
  noFill();

  for (int i = 0; i < width; i++){
    float r = (5+in.right.get(50)*150);
    float l = (5+in.left.get(i+1)*500);
    pushMatrix();
    translate(0, 300);
    ellipse(i*5, l, r, r);
    popMatrix();
  }
}

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

uqam

Re: Minim - getLineIn and OSX
Reply #1 - Nov 9^th, 2009, 1:39pm

I use JackPilot to solve problem like this. With JackPilot, you can route any of your input signal, including an internal application like iTunes, to the applet. It is a bit tricky to fixed because you have to follow some steps in the order :
- Open JackPilot and launch it (which is not the same)
- Go on your system sound preferences and choose jackPilot as input and output
- Open both applications you want to connect together : Processing and any iTunes, for example, or the input you want to listen. Run Processing so the applet with your Minim code is execute normally.
- Go back on JackPilot and route the signal from the input you like to your Java applet. For this, you should have to look in the documentation of Jack, because the way you need to select and activate the link is not very clear the first time. Also, you can block the routing between Mic input (system) and the java applet, so it wont react to the sound getting in by the internal microphone.
Voilà.

hndrsn

Re: Minim - getLineIn and OSX
Reply #2 - Nov 10^th, 2009, 7:50am

Thanks for the response! I've been using jackosx for another audio-vis app (Fluxus), but you have to connect the app to jack with a line of code. Is it the same case in Processing?

I can't seem to get jack to recognize the java applet, and there's no mention of it in the documentation.

Code:

  in = minim.getLineIn(Minim.STEREO, 512);

jns YaBB Newbies Offline Posts: 11	Re: Minim - getLineIn and OSX Reply #3 - Nov 17^th, 2009, 9:41am i'm running os x 10.5.9 and don't have this problem with minim line-ins. i use soundflower to route itunes to processing. set output to soundflower 2 ch and input to soundflower 2 ch in system preferences/sound. use soundflowerbed to route audio to your speakers...

jonobrone

Re: Minim - getLineIn and OSX
Reply #4 - Nov 25^th, 2009, 9:09am

I'm not very familiar with minim, but very familiar with Sonia. I don't know if it's similar to Sonia in the sense that you can pick up the audio of whatever is default for your computer (ie whatever your line in is under System Preferences>Sound), but I use Soundflower to route all of my sounds to the default. Takes care of line in, mics, midi's, you name it

http://cycling74.com/products/soundflower/

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