Jump to content

Ghost Audio Track


Recommended Posts

I'm having the weirdest issue with some audio tracks I recorded to my MixPre 3 II yesterday on a doc shoot. I had one boomed shotgun and one wireless lav connected to the MixPre, and everything was fine for the first two tracks. It was a very intense interview with a family who's youngest child got cancer from pesticide spray, so I was very caught up in the interview. At a certain point I noticed that the lav mic signal wasn't showing up on the recorder's screen so I stopped rolling to find the problem. If I remember correctly, the lav mic's channel was toggled off (I'm not sure how that happened, maybe when I was trying to adjust channel gain while focused on what my subjects were saying). I figured I just wouldn't have lav audio for however many takes the problem when on for.

When I pulled everything into Premiere, more takes than I expected didn't have the lav iso, which is the fourth channel in the WAV file. Then I noticed that the source monitor shows 4 channels for these clips, but when I pull them into the timeline only three show up, the lav channel is missing, as the screenshot below shows. 

If I open the original WAV file in Audition, it again shows four channels and when I extract the channels to mono files, the fourth channel does have audio present. What's going on here?

Screenshot (1).png

Link to comment
Share on other sites

EOSHD Pro Color 5 for Sony cameras EOSHD Z LOG for Nikon CamerasEOSHD C-LOG and Film Profiles for All Canon DSLRs
On 9/5/2020 at 5:42 AM, IronFilm said:

Ah, more software to learn. Funny that it is incompatible with 32-bit float files. Of course, these files aren't 32-bit float because I was powering off of a USB power bank. The powering options are the main thing I don't like about the MixPre. I don't want to pay $65 to $100+ for a simple plastic battery sled to use better power options than AA size batteries.

On 9/4/2020 at 8:26 AM, Jeremy Clark said:

This has tripped me up MANY times - make sure that all the audio tracks in premiere are "on" (you have 3 active channels - A1-A3. Click so all are blue, then drag them over and see). 

It wasn't that the tracks weren't on. With the first clip, I was able to drag all four tracks in and I didn't change anything for the other ones that wouldn't drag the "ghost track" in. This screen grab is from a lot later on, after I deleted tracks I wasn't using and did some work in Audition.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...