What does this symbol mean?

Polarity

Sometimes it is also labeled "Phase" or "Phase Invert". It flips the phase of the audio signal by 180°.

This is an important topic and when working in audio production, you should read up on it a little bit. No need to understand all the technical background, but at least have an idea about the basic concepts.

Here are just a few points:

• Changing the phase of an audio signal has no (audible) effect if you work on a single audio signal or audio signals that are not "correlated" (two completely different audio signals)
• When you have two identical signal (two Channel Strips) and you "invert the phase" on one Channel Strip, then the signals will cancel each other out.
• Using two microphones to record one acoustic signal could result in a bad "phase correlation" due to the distance of the microphones to the source. This could cause a colorization of the signal that can be improved sometimes by "flipping the phase" of one Channel.
• When you hook up your two analog speakers and connect the + and - speaker cable (indicating the polarity) on one speaker wrong, then your speaker are "out of phase", a very undesirable effect. If you don't know how that sounds, do it on purpose.
• Sometimes in a mix you can use the phase button to create an "out of phase" sound on a stereo signal to widen it in the stereo image. However, you have to be aware of the concequences when listening to mono.
• A lot of your favorite Audio FX (Chorus, Flanger, Phaser) are using the concept of "messing with the phase" to achieve specific effects

Logic's Channel Strip doesn't have a didicated Phase switch. The one from your screenshot is the Audio Device Control which functions as a Remote Control for the controls on the connected Audio Interface.

However, you can add the Gain Plugin to any Channel Strip, which has a "Phase Invert" button.

Hope that helps

Edgar Rothermich - LogicProGEM.com

(Author of the "Graphically Enhanced Manuals")

http://DingDingMusic.com/Manuals/

'I may receive some form of compensation, financial or otherwise, from my recommendation or link.'

Changes all your chords to half-diminished. (although the vertical line is more commonly slanted) 😝

😁😁😁

You know, Pancenter, I always thought it changed your chords to minor seventh flattened five chords...

octopi wrote:

You know, Pancenter, I always thought it changed your chords to minor seventh flattened five chords...

mi7-5, Also known as half-diminished, the diminished symbol with a slash through it, one and the same.

Ooops, should have put the sarcasm symbol...

Had a load of charts a while ago where all chords where crammed in, written in full (Amin7b5 | Dmaj7b9), and I said "can't I just put the symbols for dim, half-dim and maj/min?" etc

It made the chart a whole lot neater.

Oops... sorry, I thought you might be putting me on as I know you have that kind of experience...

Do you mean like this....? hehe

You guys are cracking me up with your posts. Love it! Keep it up. 🙂