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I'm looking for an audio meter tool that will attach to any input or output on my Mac and show me the audio levels on that channel. I need it to show me independent levels for stereo sources so I can tell if a source is playing only audio on one channel or another.

Does anything like this exist?

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2 Answers 2

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I'd start with Piezo and move up to Audio Hijack Pro if needed.

Piezo

It's small, gorgeous, and minimal and you get some nice old school VU meters showing the left and right channels.

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I hadn't considered recorders since I only want to see the levels, but I'll keep 'em in mind. Thanks! –  Ian C. May 25 '12 at 18:06
    
Ignore the small record button - Piezo's interface is basically two meters and you don't need to pay unless you want to record more than ten minutes at a time. It should work indefinitely as a monitor for you. –  bmike May 25 '12 at 20:52
    
Perfect! I didn't realize it was free if I didn't want to record. Excellent spot. Thanks! –  Ian C. May 25 '12 at 20:53
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Another tool is audacity. It has a stereo level monitor. See http://audacity.sourceforge.net/ Audacity is free and open source, but it's a recorder and editor, which may be more than you want.

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I considered pairing Logic with SoundFlower, similar to this, but it seemed like a lot of effort to test what I'm testing. Still: not a bad idea. Have an up vote. –  Ian C. May 27 '12 at 1:41
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