[James Reid]

This may not be your issue…but
If you are runing Compresor 3.0.1 AND you have installed
QuickTIme 7.2, when upsampling audio with that combination
your audio will be truncated.
However, if you use QuickTime Player 7.2 to export and upsample, your file length will not be changed.

[James Reid]

Oops, spelling error of course.
Two “p”s is enough.
“Apple MPEG4 Decompressor”.

[James Reid]

Well, this is odd.
I have uninstalled Perian, downloaded a fresh copy of your file and QuickTime player 7.1.6 still opens it.
Info says it’s using Appple MPEG4 Decompressor.

[James Reid]

I have Perian 1.0 and yes I can export.
Perhaps you have the ealier Perian .5 ?

https://perian.org/

[James Reid]

I have the Perian QT plugin installed.
Your file opens wihout problem.

[James Reid]

Have look at my post here for a “how to” revert to QT 7.1.6:

https://forums.creativecow.net/readpost/8/952115

[James Reid]

Apple has posted an info doc that actually works.
(reinstalling Compressor is tricky, but compared with the alternative of reinstalling everything, it’s a lot less time consuming)

[James Reid]

I have used the following process outlined in the macfixit link provided.
It isn’t a totally satifactory fix.
Leftover files installed by 7.2 are not replaced or removed by the reinstall of 7.1.6.

Proceed at your own risk.
—————————————–
Get 7.1.6 here:
https://www.apple.com/support/downloads/quicktime716formac.html

For those who installed QT 7.2 and then discovered problems with some other applications and have tried, or intend to try the “force reinstall” of QT 7.1.6 with Pacifist, using the method outlined here:

https://www.macfixitforums.com/showthreaded.php?Cat=&Board=tiger&Number=822118&page=&view=&sb=&o=&vc=1

…there may be a gotcha.

The 7.2 installer creates a new folder “MIO” that didn’t exist with 7.1.6

./Library/Application Support/ProApps/
MIO/RAD/Components/QuickTimeH264.component

And that is “QuickTimeH264.component” version 7.2
The same version of this “QuickTimeH264.component” is also installed in the QuickTime folder in ./System/Library/QuickTime

The same updated QuickTimeH264.component is installed in two different locations.

When you do a force reinstall of QT 7.1.6, the correct 7.1.6 version is restored in the ./System/Library/QuickTime folder, but it doesn’t know anything about that new folder.
So what you end up with are two different versions of the “QuickTimeH264.component” in your system.

What the consquences of this may be I don’t yet know.
Leave the new folder alone, or delete it?
I have deleted it and haven’t experienced any obvious problems…yet.

The best solution is to wait for QT 7.2.1
or do an “archive and install” (shudder) which will invariably mess up your FC Studio install enough that you will then be forced to erase your hard drive and start all over again.

[James Reid]

QuickTime 7.2?
That’s brave of you. No trouble with any other apps since you installed this?
I’m holding off for 7.2.1 😉

[James Reid]

Phase

Audio waveforms are cyclical; that is, they proceed through regular cycles or repetitions. Phase is defined as how far along in its cycle a given waveform is. The measurement of phase is given in degrees, with 360 degrees being one complete cycle. One concern with phase becomes apparent when mixing together two waveforms. If these waveform are “out of phase”, or delayed with respect to one another, there will be some cancellation in the resulting audio. This often produces what is described as a “hollow” sound. How much cancellation, and which frequencies it occurs at depends on the waveforms involved, and how far out of phase they are (two identical waveforms, 180 degrees out of phase, will cancel completely).

Phase Invert

A switch found in the input sections of mixing consoles and mic preamps.
The term “phase invert” is actually a misnomer, since what the switch really does is invert the polarity of the signal in that input (correct usage would be “polarity invert”).
Its intended use is to correct for balanced lines and mics that are wired backwards. In some cases toggling the phase invert switch may make a sonic difference if signals are out of phase, but doing so will also put that signal out of polarity with the others.