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Outputs mirroring
Hi. I'm on an IPad pro running 15.6.1 connected to a TASCAM US 4x4 interface. I can route sounds to the individual outputs using other programmes (like MiRack). I'm pretty sure I've been able to do this successfully with AUM too.
But the behavior today always send sound out of the USB 1+2 even when I've selected USB 3+4. I'm on the latest version of AUM (1.4.1). I should note that Mic&Speaker Output Route in Settings shows US-4x4UR with the Airplay symbol.
I've made sure that the various pass through options are not enabled on the interface and as mentioned can confirm that the behaviour is not happening in other programmes that allow me to send sound to specific outputs. Help would be much appreciated as i've a concert i was hoping to use this with at the weekend.
Comments
I don‘t think Airplay can do multi-channel output, so everything gets routed to out1+2.
Thanks @Telefunky So how do i prevent AirPlay being enabled though? I can't seem to stop the other outputs routing to 1+2 and indeed i suspect its something to do with AirPlay.
Sorry, I‘ve never used Airplay ... there should be a control panel or something in Bluetooth settings
Nor I. Nothing i seem to do can switch off the AirPlay in AUM. Turning off bluetooth on the iPad and in settings seems to do nothing.
I don't believe Airplay has anything to do with it. AUM may just be using the icon to indicate "not internal".
Edit: I just checked this, and AUM shows an orange AirPlay icon in its settings when connected to a USB audio interface. It shows a blue AirPlay icon when connected to Bluetooth speakers. So AUM is indicating the correct connection, but it indicating that "speaker" output will be sent to the audio interface. And you may not be able to route speaker output to specific interface channels.
Have you tried disconnecting everything, restarting the iPad, and reconnecting?
Also, make sure AUM has nothing routed to the default speaker output.
I've tried that yes (disconnect, rebooting etc.)
But your question about the default speaker output is interesting! How do i NOT route something to that? And where is it? When i select Output Route in settings it doesn't let me "unselect" anything. It just tells me that output route is my interface.
AUM gets that "speaker" output from iPadOS. It cannot be changed.
In AUM, you need to route your master channel output to the desired ports, and route nothing to "speakers". If you have multiple channels in AUM, route the output of each channel to a "Master" bus ("Send to Bus A"), then route that to your output device. The pic shows the general idea.
That's really helpful. Thanks for making the effort to clarify that.
However what do you mean by "route nothing to "speakers""? I have four physical outputs available on the audio interface.
Unfortunately the routing below both routes to the same outputs 1+2 (though the second add 3+4 to the output also)
OK. Your second pic seems to show nothing routed to speakers, or USB 1+2. Does the interface have some sort of direct monitoring enabled that might be driving outputs 1+2? Also, I assume you have no other audio apps running, and that you're using miRack as AUv3, not Inter-App Audio.
Could you try a really simple setup: AUv3 synth in AUM, routed to USB 3+4? If that does not drive 1+2, then you know that AUM is working properly, and the extra output is coming from somewhere else in your rig.
Yes. I've tried this... No direct monitoring enabled. I can switch to the different outputs perfectly in say MiRack. So its definitely not the interface itself. No other apps running... reboot and booting straight into AUM. Behavior is the same.
If i try your suggestion (say Borderlands synth) and route it to 3+4 the sound comes out of both 1+2 and 3+4. Indeed if i route it to 1 (mono) or 3(mono) then i get the left channel in both scenarios. Very strange... this worked perfectly before.
Can i ask what version of AUM you are using? Also, i'm aware this is not the AUM forum but its where a lot of AUM discourse seems to be happening.
I wonder has there been some update in IoS ir AUM and have i found a bug?
What if you route a mono signal in AUM to output 3 or 4?
As follows:
1+2 = 1+2
3+4 = 1+2 +3+4
1 = 1
3 = 1 +3
2 = 2
4 = 2+4
A bit made really.
I'm on iPadOS 15.7 (iPad 6) and AUM 1.4.1. What is your iPadOS version? Are you maybe on a 16 beta?
You say audio routing to the interface worked perfectly before. What changes to hardware or software have you made since then?
iPad Pro running 15.6.1 (USB -C connection) to Tascam US 4x4 HR. AUM 1.4.1.
Perhaps i should upgrade to 15.7?
No changes unless the iPad updated something without my calling upon it to do so. And can confirm that full control over routing is possible within MiRack (where i can for example send an Oscillator directly to each output.
Played a concert with this setup at a number of festivals earlier in the year. Was rock solid. I'm pretty sure it worked last week when i was in rehearsals for the next concert too.
I don't really have another interface to try though. All rather bizarre.
Do you have another host such as Audiobus 3 or Loopy Pro or ApeMatrix?
I've not used these apps yet and as i'm traveling to the city where I'm playing in the morning i doubt it would be good to switch now. I'll have to work around this issue. Though i might document it on YouTube for AUM to have a look at it. It does seem to be a bug. Pity AUM doesn't have an active forum to contact though I've email Jonathan also to get some insight.
Thanks for all the efforts to set this right (@espiegel123, @uncledave and @Telefunky) It seems there is a phantom connection always in place to the outputs 1and2 which i can't seem to switch off. I might upgrade to the latest iOS to see does that change something!
@zentrumsounds : btw, I am not suggesting the other apps to switch to them… just to test to see if they exhibit the same behavior as it might provide a clue.
Did you try sending to 3+4 via the Hardware Bus Send in AUM?
FWIW, the 3+4 will only work as an input on the AudioInterface in AUM for physically plugged in instruments. It won't work as a Virtual Input on the interface. However, if the interface offers 3+4 OUT, the Hardware Bus send should be able to send the virtual instrument to those available Outputs on the unit, and allow you to process the sounds how you want to.
My guess is that the Tascam unit only offers 1+2 as a dedicated Output over USB, and in AUM, you access 3+4 as a Hardware Bus...since this is the nature of Bussing on hardware when routing audio on a mixing board.
Hope this makes sense. Good luck with your Show this weekend.
Thanks @echoopera. Yes i think we shared a suspicion. But that's been undermined by my ability to wire directly to each output using MiRack. I can send an individual oscillator to each of the independent outputs within the virtual modular synth on the iPad and it ONLY comes out of the output in question. So this really does seem to be an AUM thing rather than an interface thing.
Sending on the Hardware Bus send exhibits the same behaviour by the way... Thanks for describing the option visually.
At this point i'm hoping the developed might have a thought on this but i've not heard back as of yet.
What happens if you keep MiRack playing and launch AUM ?
Dang. I was hoping that resolved it. AUM must not be seeing it then. I’d ping @j_liljedahl here to see if he’s encountered this sort of issue before with AudioInterfaces and AUM not playing nice when other apps do.
Does it work with other apps other than miRack? Cubasis, Drambo, LoopyPro by chance?
There is a facebook group and a discord server. See "Community" links here: http://kymatica.com/apps/aum.html
regarding the issue here, is there anyone else here that can reproduce this problem, with the tascam 4x4 or any other interface?
I think it sounds very much as some internal Monitoring is enabled in the interface. But then the question is why that doesn't happen in miRack. Are you using the same sample rate and buffer settings in both?
@j_liljedahl : maybe you could answer a question, a friend used to experience where his interface was well-behaved in AUM but in another host would find it wasn't with regards to the input level from the interface (which was software settable). It seemed like the other host (which didn't offer input level control) always reset the input level.
Do different hosts use different methods for initializing the class compliant driver that might result in differences in behavior like this?
There's not much that can be done from the app side, but one thing I've noticed is that some (very few) USB audio interfaces take note of the hardware volume setting on the iOS device, which normally only affects headphones, internal speaker and bluetooth etc. I haven't checked if the device volume setting can be changed from software (that could be quite disturbing, if some app suddenly put it at 100%, so I doubt it).
The only thing I've noticed that can be done differently, and also here only affecting some audio interfaces, is that an app can ask how many audio channels it wants up to the reported max-number-of-channels of the interface. AUM always asks for the smaller value of interface reported max-number-of-channels and 32 which is currently the hard-coded maximum in AUM.
PS. I only have two multi-channel interfaces to test with, one Cymatics Audio uTrack 24, and one Focusrite Saffire 6i6, and both works as expected regarding channel routing. I can send to USB 3+4 just fine and it won't come out of USB 1+2. However, the Focusrite needs to be setup correctly in the quite confusing Focusrite Mixcontrol desktop app. For example, it's easy to make its physical outputs 1+2 get the audio from any mix of "DAW channels" (which are the actual logical audio interface channels as represented in AUM or any other DAW).