Multitrack / Multichannel Audio

[Peter Foulkes]

Hello,

I have a project coming up that will require replay of multiple channels (8) of audio as a series of songs.

I understand that the best way to do this in Qlab to ensure the tracks stay in sync is to use a multichannel wav file.

Does anyone have experience of this method? Can you point out any potential issues, helpful suggestions?

The audio is currently in a Pro Tools 12 session. What is the best way of getting this data into a multichannel wav?

Thanks for any advice you are able to give me.

Peter

[micpool]

Export as mono files

Use Wave Agent, Twisted Wave, or similar to combine the mono files into a multitrack wav

[micpool]

https://qlabcookbook.com/1983/02/01/mixing-stems/

You might find some useful info in the above link

Mic

[Peter Foulkes]

Thanks Mic.

As a long time follower of your great set of cook book pages it is reassuring to get an answer from you. I'm surprised I didn't notice the stems article before.

Peter

[Mark Valenzuela]

> I understand that the best way to do this in Qlab to ensure the tracks stay in sync is to use a multichannel wav file.

I have a follow up question to this. My understanding is that with the audio engine built into QLab 3 & 4, separate audio tracks are guaranteed to sync. So there would be no functional difference between using a multichannel WAV file, or programming in a series of mono or stereo files that play simultaneously, in terms of the way they stay in sync. Is this correct?


Mark V.

[Sam Kusnetz]

Hello All

Audio cues which are assigned to the same audio patch and which are started simultaneously (via a Group or auto-continue) are indeed guaranteed to stay in sync. So, in this situation, you are correct that a multi-channel audio file is not the only way to meet this need.

It’s worth pointing out that opening multiple single-channel files is more processor-intensive than opening one multi-channel file, so if you’re pushing your computer to the limit, you can save a little power by consolidating mono or stereo tracks into a multitrack.

Best

Sam

—

Sam Kusnetz | Figure 53

s...@figure53.com

--
Contact support anytime: sup...@figure53.com
Follow Figure 53 on Twitter: http://twitter.com/Figure53
---
You received this message because you are subscribed to the Google Groups "QLab" group.
To unsubscribe from this group and stop receiving emails from it, send an email to qlab+uns...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/qlab/ACFB417F-EE2C-4A55-BC9A-3F0C9AA79B57%40fastmail.fm.
For more options, visit https://groups.google.com/d/optout.

[Mark Valenzuela]

Thanks for clarifying Sam!

MV 

To view this discussion on the web visit https://groups.google.com/d/msgid/qlab/CAOOK5Aby92C%2BA0B29dPpGYYdpcxRJHceFdUV0pGuAUyPOMw4xg%40mail.gmail.com.

[JB]

Is this also true for audio cues triggered by a start cue? For example, if I have a group cue with some audio cues and start cues which target other audio cues, will they all play in sync if the group cue is set to trigger all cues simultaneously?

Thanks

Jens

[Chris Ashworth]

Hi Jens,

Yes. If you have a group with audio cues and start cues that target other audio cues, they will all start in sync if the group is set to trigger all cues simultaneously.

Here is a sketch of the underlying logic:

• Triggers for incoming actions, e.g. GO button, hotkeys, MIDI, etc, put up a flag that says "Dear QLab, please begin collecting actions that should be synchronized”.
• Then QLab goes and does whatever has been triggered: fire cues, which might in turn fire other cues, etc, etc.
• Whenever that sequence of events is finished, when it wraps up the original trigger says "Okay! I've done all the work, whatever happened since I told you to start collecting actions, make sure that's synchronized”.
• This means that anything that was programmed to happen “simultaneously” (instantly, without further waits) during that batch of work, will be synced where possible.

Best,

Chris

[JB]

Thanks for clarifying this!

Jens

[Gunther J. Kibelkstis]

Hello friend

Use the "Sound files merger" software to merge Waves into a single multi track file.

Then you can open in QLAB 3 or 4 and mix as you want. It's simply too easy.