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Index › Programming Questions & Help › Sound,  Music Libraries › getLineIn() and OS X default audio input
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getLineIn() and OS X default audio input (Read 1341 times)
Nappi
getLineIn() and OS X default audio input
May 15th, 2009, 9:38am  
Hi,

I just started playing with Processing and am trying to make a simple music visualization. Since I seem to be unable to read the signal that is sent to audio output* (music playing in iTunes and all the other sounds), I thought I'd settle for listening to line-in. So I changed line-in to be my computer's default audio input instead of built-in microphone, made sure it worked (with a screen saver that visualizes default input signal) and started fiddling with Processing.

To my surprise getLineIn() function still used the input from microphone instead of that from line-in. Is there anything I can do about this? Is this a bug or a feature?

I suppose this could be a OS related issue so maybe someone with a Mac could try changing the Default Input in Application>Utilities>Audio/MIDI Setup and running the GetLineIn Minim example while banging his or her head on the table or something.



*Has anyone been able to achieve this on OS X by the way? I figured I'd need something similar to Stereo Mix in Windows and a program called Soundflower seemed promising. Didn't get it to work with Processing though. Most likely because getLineIn() isn't operating like it should in the first place..


I'm running OS X 10.4 (Tiger).



Thanks beforehand,

Tomi
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adam sax
Re: getLineIn() and OS X default audio input
Reply #1 - May 23rd, 2009, 6:30pm  
Yeah I ran into a very similar issue with Minim. I think it does with the way minim is built on top of Java Sound API which I think uses whatever the default device is. To get around this I just ended up using Sonya which will use whichever audio device is selected in System Preferences.

It was a fairly easy swap out.

Hope that helps.

-adam
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