Question / Help Multiple Audio TRACKS with one Device?

JazzyJ

New Member
I'm using an M-Audio 2626 as an audio device - can I record separate audio tracks from this one device? Basically if I want 3 isolated audio tracks do I need THREE audio interfaces/devices or can ONE device (M-Audio 2626) record 3 isolated, separate tracks. Thanks for your help.
 

Narcogen

Active Member
Not without other software. OBS understands stereo and surround, but not arbitrary multichannel devices. OBS doesn't have a method to select and isolate channels from your device.

I use LoopBack for this purpose.
 

mgw

Member
Hi, we want to stream the video and two audio tracks together. We are using loopback to do the mixes we want and create a device for each mix. We just cannot find a way to stream via RTMP a video stream with two audio tracks. Is it possible? If not, can we create a second stream with only the second audio in it and no video?
 

Narcogen

Active Member
No, this is not possible. RTMP only supports a single audio track. You'll notice OBS only allows you to choose a single track.

You can define one track as a muxed track, with all the devices you want on it, as well as other, separate tracks for recording purposes that have devices isolated on tracks.

OBS can only send one stream at a time.
 

JazzyJ

New Member
The only program I've come across that can do this is 'Quicktime 7 Pro' on the Mac (not Win). In QT7 pro, you go to preferences and select 'Native Device' this will record uncompressed video and audio together with as many inputs as your Audio interface has. You then export the audio (PCM) and open it in a DAW and all the tracks are there. Only problem is that you can't choose the amount of tracks (it uses ALL the inputs of your interface) so I have 26 tracks and end up deleting 22 of them, leaving me with the 4 I used for audio. Then you can do your edit, mixes etc, add it back to the video file (in QT7 pro again) and you have your finished video. This is not for streaming obviously, but it's the only program I've ever come across that can record Video AND multiple audio tracks at the same time. Incredible that in the last 25 years nobody else has figured out how to do it......
 

Narcogen

Active Member
This is not true. OBS absolutely has the capacity to record multiple audio tracks. You need to enable advanced output mode to access it.

What it can't do is distinguish between the available channels on a multichannel input without additional software. However, once you do that (say, take a 12 channel external device and turn it into 6 virtual stereo channels in LoopBack) OBS can record each of those devices on a separate track if you wish.

It can only stream one track at a time, though, which is why most users who both stream and record have one track that is muxed and designated for streaming, with all devices present.

Screen Shot 2020-03-24 at 12.04.20 PM.png
 

mgw

Member
Thank you all. SIgh wish OBS could stream at least two streams at once. Is it possible to run two instances of OBS on OSX? One fore the Video with Audio track 1, and one woth audio track 2?
 

Narcogen

Active Member
This is not a limitation of OBS, it is a limitation of RTMP.

You CAN run two instances, but this is not recommended. They will use the same preferences, profiles and scene collections, and OBS will complain about the second instance in its log.

Load on the system will be doubled, of course.
 

sketta

New Member
No, this is not possible. RTMP only supports a single audio track. You'll notice OBS only allows you to choose a single track.

You can define one track as a muxed track, with all the devices you want on it, as well as other, separate tracks for recording purposes that have devices isolated on tracks.

OBS can only send one stream at a time.
Hello Narcogen,
Can you please tell me how to define one track as a muxed track for Streaming?
Thank you very much.
Regards.
 
Top