Audio ?'s - New Guy Stuff

lucey

lucey

Active member
When recording sound with the DVX i use input 2 with channel 1 slightly reduced for clipping and such. When i import to FCP i get a track of audio on A1 and A2 (2 tracks of 16bit per track). Obviously i get stereo tracks in each A1 and A2. Is that correct ?

If i delete say A2 track i then now have a mono track, but i still have a 2 tracks of 16 bit ?

With regards to the lower set audio Channel do you keep both A1 and A2 or do you usually scrub one, or do you adjust the level on the lower set audio. What is the general workflow used ?
 
I would use the normal set audio, except for where there a peaks.

FCP has a cool function called Marking Audio Peaks -

1) Make sure that you have UNselected all audio and video in the timeline.

2) Go to Mark > Audio > Peaks > Mark. Final Cut Pro will then place peak markers in the Timeline Ruler above the sequence hot spots. If a section of your audio has a hot point that lasts longer than a spike, a peak marker with a duration will appear over that area in the Timeline Ruler.

Then either lower the audio if it is distortion caused by the track being too loud in FCP (command+[) or option+razor that section and use your softer audio.

A couple of other good shortcuts:

command+> = pan center track

command+< = pan left track

command+? = pan right track

command+] = raise volume by 3db

command+- = lower volume by 1db

command++ = raise volume by 1db
 
When you say normal set audio do you mean just use say either A1 or A2 depending on which works better as far as spikes go. Then delete the other, leaving one audio track instead of the original A1 and A2
 
BTW, just to be clear (I'm surprised that no one jumped in on this before) you don't have stereo audio, you have two mono tracks.

Phil
 
Well phil I thinks it's because it's the middle of the day and folks aren't checking in... I was just about to post the same thing.

AND yes you don't want to double up your tracks. So delete the unused audio or, if your going to have someone do audio post you could just move the unused audio to an extra muted track. That way the person doing post has the option of swapping out bits. Their sound system is probably going to be a lot better than the one your listening on and they may hear stuff your not catching. If nobody's doing post then just delete what you are not using.
 
So i guess what i am hearing is just use either A1 or A2 not both. Why do AIFF files have two separate tracks eg A4 and A5 ? Stereo ? When listening through the DVX channel 1 seems to be on the left side and channel 2 on the right, no ?. When you delete say A1 (in FCP) you still have two mono tracks on A2 ? A1 + A2 = 4 tracks of 16 bit audio, no ? When you import your own audio into FCP you only use say A1 with 2 mono tracks of audio. do i see this right ? I'm trying to understand this for workflow purposes. I understand its not stereo. Shine the light !
 
Hey Lucey,
If I am hearing you right, you want to know why an AIFF of say a CD has two separate tracks...Yes it is a stereo interleaved file that FCP reads as two tracks linked together and automatically pans them left and right. You can break the link with option + L and you can break the link of audio to video with command + L.
As for the DVX, as far as I am aware, it only records 2 mono tracks in 16bit audio. In FCP, those tracks are automatically placed on A1 and A2 and are usually 'summed mono' by panning both to center. When you listen to the head phone out of your DVX, they will be panned left and right.
HD aquisition has 4 audio tracks recorded natively. The HVX records 4 mono 16bit tracks of audio, which are all panned center by FCP.
The DVX may record 4 tracks as well in 12 bit audio, something I am unsure of.

With the DVX workflow in FCP, when you delete A1, you will only have a single mono track of 16bit audio on A2. Same when you delete A2, you will only have a single mono track on A1.

I have found that you can use A1 and A2, both with exactly the same audio, at the same time, if it makes sense to do so. Normally, I leave the tracks there and just 'disable the audio clip' by option clicking the audio I don't want and using the control + click menu to choose 'disable clip'. That way if I need it later in the process, I don't have to find the match frame and re edit it into the time line. You can also click the little green audio light on the far left of each of the tracks to disable the whole track (doing so will delete any renders).

Hope that helps.

J
 
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