Adding audio track to existing edit?

Hi guys,
I'm working on a short doc and now in finalizing my edit. The audio in my edit is the in-camera audio. Now I would like to replace the in-camera audio with 2 audio tracks (4 channels total):
- Boom (track 1)
- L/R channel from 2 lac mics (track 2)

What I've done:
- "Auto-sync audio based on waveform and append tracks"

Yeah! In the media pool I now have my video tracks with the correct audio. When I import this track it adds a video tracks with 4 audio channels.

But! My existing timeline still has all the clips with just 1 audio track (2 channel) in-camera mix. I can't seem to find a way to update my timeline with the new audio so that it automatically adds the 'extra' audio track. Is this in any way possible? Are there other solutions?

(I've tried 'relinking' but this only works from the media page to the actual files. I need a way to 'conform' my timeline to my media pool...)

Oh dear, you've done the editing before sync ? That's sound like a terrible idea...

I think you could have got yourself out of trouble if you had a proper timecode in your files. Exporting the timeline as an EDL, reimporting it without medias and specifying the audio folder only in you media pool might have been a workaround (maybe editing by hand the EDL file in the process) but doable. However, if I got this right, it won't work for you... You mentioned "Auto-sync audio based on waveform" ? I assume that implies the audio TC does not match the video TC ?

AFAIK, Resolve can't autosync within a timeline, you have to do it in the mediapool and indeed, that will affect the master clips but not their previous usage...

Two Ideas come into my mind :

The tedious manual way : write down Begin TC and End TC of each clip in your timeline, and rebuild a new timeline from your now complete synced master clips.

The third party way : Adobe Premiere can autosync clips in a timeline, one clip at a time (1 linked audio/video + n audio tracks).
You could either spread the clips appart to give room for the full audio lenght, sync, trim the audio and put the timeline back together, or you could stack the audio clips giving them one track per clip and then trimming the audio tracks to corresponding clips above.
Alternatively, Red Giant sells a software that can perform those tasks in a more automated way : Plural Eyes, it should work as long as you give each clip a separate pair of audio tracks to move along.

Either way, it's going to take a lot of work... From my experience, what seems tedious at first (manually doing the job, one clip a time) generally ends up being the shortest solution. Digging into new softwares and workflows is generally time consuming on itself and if it is a one time fix, you'll probably find out that it was just not worth the effort. Actually, you'd probably be done with your timeline by now if you had begun working on it instead of asking for help in this forum!
If the effort turns out to be useful in the future it might be worth it, but in your case, frankly the lesson is : DO NOT START THE EDIT BEFORE SYNCING !

It would be cumbersome even if it worked (you'd have to do one timeline clip at a time), but did you try a "force conform" between the existing timeline clips and the newly synched up originals?

I've tried the force conform but didn't work for me. I'm realizing this the hard way: never edit before syncing audio.

What I've done as a 'workaround': I used PluralEyes to apply the new tracks to a copy of the original files and used 'relink media' to point to the tracks with the new audio. I only needed to adjust the audio tracks mapping in Resolve. Fortunately that could be done by selecting all the clips and adjusting the "clip attributes".

Thanks guys

Hi guys,
I'm working on a short doc and now in finalizing my edit. The audio in my edit is the in-camera audio. Now I would like to replace the in-camera audio with 2 audio tracks (4 channels total):
- Boom (track 1)
- L/R channel from 2 lac mics (track 2)

What I've done:
- "Auto-sync audio based on waveform and append tracks"

Yeah! In the media pool I now have my video tracks with the correct audio. When I import this track it adds a video tracks with 4 audio channels.

But! My existing timeline still has all the clips with just 1 audio track (2 channel) in-camera mix. I can't seem to find a way to update my timeline with the new audio so that it automatically adds the 'extra' audio track. Is this in any way possible? Are there other solutions?

(I've tried 'relinking' but this only works from the media page to the actual files. I need a way to 'conform' my timeline to my media pool...)

I know this is 4 years late, but, for you or anyone looking for this information, there is a workaround!

After placing all the clips you wanted only to realize you didn't sync sound first, select the video clip in the timeline.

Next, go to the top menu and select "Clip > Match frame to source clip". This will pull up that specific edit into the preview window with the original media selected in the pool.

From here, the audio you JUST synced will be appended to the source file. With the in and out points properly set from the first step, all you need to do is drag down the AUDIO portion by dragging the waveform icon in the preview window, down to the timeline under the clip you've already cut. Use the magnetic feature to align the clip and you're synced!

Hope this helps!