I posted this on Apple's FCP discussion page, and so far no responses 
have come up.  Perhaps one of you might have some ideas?

-------------------------------------------------------------------

I've noticed something strange with AIFFs of background music I've 
imported from a CD, that is, not recorded as part of the video. (This is 
a "just for fun" practice project, so no copyright issues here.) I 
imported them by copying them from the CD into the scratch folder, and 
then dragging the AIFF file into an audio bin in the Browser window.

What I've discovered is that they'll sometimes unexpectedly turn 
monaural for no readily apparent reason. I do know one thing that causes 
it: When I touch the pan knob for that audio, it becomes monaural.

However, most of the time, I'm not touching the pan knob, and just in 
time it becomes monaural for no readily apparent reason. It still shows 
on the timeline as a stereo pair, but the sound on playback is clearly 
the same for both channels.

If I delete that sound clip on the timeline and replace it from the 
audio bin, it's back to stereo again.

I don't know for certain, but my best guess would be that the point at 
which it becomes monaural is when an auto-render hits it.  [After 
further experimentation, I'm pretty sure Autorender is in fact what's 
doing it.]

Do any of you have any ideas why that might happen? I'm FCP HD 5.

Thanks, everybody!

-- 

(Preferably reply to the newsgroup, please.  If you reply by Email, I
will sincerely try to receive your message, but it will probably get
buried in spam.)

Just in case anybody's wondering...

The problem appears to be a bug in how auto-render turns 44.1KHz audio 
into 48KHz audio;  for some reason it turns it into monaural.  That's 
the reason why auto-render is even affecting that audio in the first 
place.  So, if you either mark it as 44.1KHz audio in the 
Sequence:Settings dialog, or use iTunes to up-convert it, you're 
probably OK.


Gary Morrison wrote:

> I posted this on Apple's FCP discussion page, and so far no responses 
> have come up.  Perhaps one of you might have some ideas?
> 
> -------------------------------------------------------------------
> 
> I've noticed something strange with AIFFs of background music I've 
> imported from a CD, that is, not recorded as part of the video. (This is 
> a "just for fun" practice project, so no copyright issues here.) I 
> imported them by copying them from the CD into the scratch folder, and 
> then dragging the AIFF file into an audio bin in the Browser window.
> 
> What I've discovered is that they'll sometimes unexpectedly turn 
> monaural for no readily apparent reason. I do know one thing that causes 
> it: When I touch the pan knob for that audio, it becomes monaural.
> 
> However, most of the time, I'm not touching the pan knob, and just in 
> time it becomes monaural for no readily apparent reason. It still shows 
> on the timeline as a stereo pair, but the sound on playback is clearly 
> the same for both channels.
> 
> If I delete that sound clip on the timeline and replace it from the 
> audio bin, it's back to stereo again.
> 
> I don't know for certain, but my best guess would be that the point at 
> which it becomes monaural is when an auto-render hits it.  [After 
> further experimentation, I'm pretty sure Autorender is in fact what's 
> doing it.]
> 
> Do any of you have any ideas why that might happen? I'm FCP HD 5.
> 
> Thanks, everybody!
> 


-- 

(Preferably reply to the newsgroup, please.  If you reply by Email, I
will sincerely try to receive your message, but it will probably get
buried in spam.)