Create a multicamera sequence from timeline or sequence
Many times Premiere would not synch audio correctly, so I must do it manually. On my workflow, I prefer to place all the clips and tracks into a sequence for my multicamera. Usually, I nest both clips and enable multicamera, however, the audio doesn't get attached to the nest sequence.
I want to have the option to create a multicamera sequence with video and audio clips that I synched together from a timeline/sequence. At the moment, we can do that from the project panel, but not from a timeline.
I would use merge clips, but it messes up the audio, and I am tired of having issues with the sound department. Also, it doesn't allow me to merge two video clips.
Paul Murphy commented
This tutorial shows a quick and easy way to build multicamera sequences manually. You can choose which tracks of audio you want to include, and your waveforms won't disappear: https://bit.ly/DIYMulticam
James Clark commented
It'd be better to have a feature that does it as you requested, but until then, there's a few different things you can do. Which approach depends on what you want to achieve. I'll list 3 methods.
Important in choosing which workaround is what was meant by the 'audio doesn't get attached to the nest sequence'. All the workarounds I can offer do create a multicamera source sequence which has whichever audio you chose as part of it, but I think maybe what you meant was, when you live-switch the multicamera clips you're making by using your nesting technique, it's only switching the video and not the audio. In that case, only method 1 will work for you.
METHOD 1: If you want a multicamera source sequence (MSS) where you can live switch both the video and audio, usually you would need to make the MSS using clips in the bin and choose 'switch audio' in the 'sequence settings' section of the MSS dialogue box. Because in your case, you're making your MSSs by nesting and then clicking 'enable multicamera' it's bypassing the dialogue box and making the default variety of multicamera source sequence where the sequence settings are set to 'camera 1'. To get around this, you can create essentially an empty shell MSS with the correct switch audio settings in to which you're going to paste you're manually synced material. Select any two clips in your project, doesn't matter if they are synchronous with each other, right-click and select 'create multicamera source sequence', at the MSS creation dialogue box, set the sequence settings to 'switch audio'. Now take your newly created MSS in the project window and right click it and select 'open in timeline'. Select everything in this timeline and delete it, you don't want that stuff, it was just there so you create an MSS with the right settings, now go back to your sync timeline and select everything inside it (or just the parts of it you want in a single MSS), now press cmd/ctrl + c to copy this material, go back to your empty MSS and press cmd/ctrl V to paste. Now when you use this MSS, it will contain the material you wanted it to contain and you can also live switch video and audio synchronously.
METHOD 2: Maybe you didn't mean you wanted the ability to live switch audio and video at the same time (which is less common for multicamera editing) and were just having trouble creating an MSS with the audio you wanted. Try this then.
If you want the ability to make multiple different MSSs from different sections of your sync timeline (as opposed to one big one with everything from your sync timeline), follow these steps:
In your sync timeline, set in and out points over the parts you want to use to create an MSS, and also select all the video and audio tracks that you would like to be included (in case you don't necessarily want all of them). In the top-bar menu (or with a keyboard shortcut if you have one mapped), select 'make subsequence', this will automatically create a new sequence in the active bin you have open in the project window, which will be named after your sync sequence with '_sub01' as a suffix. At the moment, this is just a normal sequence, not an MSS. Splice this clip into your edit timeline, making sure you have the toggle for sequence insertion set to insert sequences as nests, not clips. The first time you do this, because it's just a normal sequence, you won't get the multi-angle view in the source monitor, don't worry, you'll only have to deal with that once. Right-click on the clip you just inserted in to your edit timeline and enable multicamera. Now, immediately, hit the match-frame key. When you do this the icon for the source sequence you created before will turn in to the icon for an MSS. Now when you use that clip it will behave just like a regular MSS, you'll have the multiple angle grid in the source monitor, and you can open-in-timeline to make changes to it later if you see fit. This will be the default variety of MSS with the 'camera 1' sequence settings, which is usually fine in most circumstances.
METHOD 3: The third and final option is almost exactly the same as the second one, but has a few less steps. Use this method if you know that you want everything in your manual sync timeline to become one MSS, and don't intend to make several. Take your sync timeline, and duplicate it (for safety's sake in case you ever want to return to your sync timeline). Now insert your duplicated timeline in to your edit timeline (with the toggle for sequence insertion set to insert as nests, not clips). Then follow the rest of the steps from METHOD 2 with this timeline.