Logic Pro (X) What about key changes?

Lefty7

Logician
Hello. I’ve been learning Logic Pro since early ’23, and have version 10.7.8. To assist, I got 2 books and perused them long before getting the new mac loaded with Logic: one from the Apple Pro Training Series, “Logic Pro X 10.4” by David Nahman, and “Logic Pro X for dummies” by Graham English. At this point, both have lots of marked post-it notes sticking out everywhere so I can access areas of interest quickly. To start the learning process once I had mac and Logic in hand, I ran several test mules – the first using apple loops, then a few combining software instruments, drum tracks and audio tracks.

As a newbie here, my first question has to do with changing key.

Another test mule turned into a project, one based on a one-minute guitar ditty that I wanted to repeat a couple of times, and have the tempo bump up along with a key change at each transition. Having scanned briefly the pertinent areas of the reference books on flex, I decided to set the tempo changes first and do the key changes after I had recorded more tracks. (Also, I wanted the fingerpicked part of the guitar thing to be faster than I could play it cleanly, so I thought I’d record it at 140 bpm, and then take it up to +150 range.) This has all worked just fine.

So when I got around to thinking about the key changes, I examined the books more closely, and caught the last 2 sentences in the dummies’ book section concerning ‘Creating key signature…changes’ where the author states; “Key signature changes don’t change the pitch of the audio or MIDI regions you’ve recorded. They only change the display of the regions in the score editor.”

So what good is that to me? I was expecting to be able to enter the key changes globally similar to the tempo changes. I see you can transpose loops and MIDI regions, but is there a way to insert key changes to affect what’s already recorded – including audio tracks? If so: how?

Thanks for the welcome; glad to be here. ~Lefty7
 
As the author of the "dummies" book wrote: The Key Signature function he is describing is part of Logic's score editor. If you are not using Logic's score, then of course this is no good to you. Changing the pitch of recorded audio is possible using for example flex pitch.

kind regards

Mark (who does make use of the key change function when preparing written scores in Logic)
 
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caught the last 2 sentences in the dummies’ book section concerning ‘Creating key signature…changes’ where the author states; “Key signature changes don’t change the pitch of the audio or MIDI regions you’ve recorded. They only change the display of the regions in the score editor.”
That's correct a key signature is part of a clef and so affects the score. There is a transpose available in the marker lane.

Right click above the track list to configure the marker lane and enable transposition. This shows you a line which you can click on and globally transposes MIDI and apple loops. To stop it transposing MIDI drums you tick the box in that track'\s inspector that says No Transpose.

I'm not sure about audio, you may need to choose which tracks are affected, possibly by Flex Pitch. That would be a pain if you are also wanting another flex mode.
 
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OK. Thanks for that.

It also appears to me that flex pitch editing is meant to correct deviations from the baseline pitch, be it A440 or whatever - and that the range of correction would not go so far as to change the key of a track or region from, say, an A to a B - or a B to a C.

Please confirm.

And, once again, thank you for your response and assistance.
 
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Hmm... OK, thank you.

Great to be a newbie, only to point out something that Logic won't do in my first thread.

I know there are complexities involved here beyond my scope, but I have to admit that I'm surprised I'm not offered the ability to insert a key change at a certain point globally.

I have an aging CD recorder that gives the ability to change keys in a minute - not a just varispeed where speed/tempo and pitch/key are inextricably linked. Granted, it's working with just a simple L/R stereo image. I am now planning on using it to accomplish what I desire by feeding it the regions of the track at the various (increased) tempos, and then laying them each back into Logic. It will require a bit of farkling around, but will be way easier than trying to re-record those guitar parts, (which, capo be damned, would be beyond the capabilities of my musicianship).

Onward we go. Excellent forum.

Best from ~Lefty7
 
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FYI Flex Pitch may be used to substantially transpose audio - it can shift something up or down more than an octave. Whether that sounds good is another matter entirely, depends to an extent on the source material, but the greater the transposition the greater the likelihood that unpleasant artefacts will appear. It's a powerful tool, but needs to be used with some caution.

kind regards

Mark
 
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That is very helpful.

Yes, I understand your point: the farther you get from the 'original', the more weird the sonic result can be.

I am surprised that Flex Pitch has that wide a working range. In the current project, I only want to shift up a half step, or two at the most.

I'll have to play with it.

Mucho appreciado.

~Lefty7
 
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I'm not sure about audio, you may need to choose which tracks are affected, possibly by Flex Pitch. That would be a pain if you are also wanting another flex mode.
Do I correctly gather from this that the use of flex time and flex pitch is an 'either/or' situation, (e.g. not concurring within the same place in a track/region)?
 
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