External Mixer Mode Audio Routing for Looper

I believe I am experiencing a bug with the recently added External Mixer mode on both MacOS and iOS. I am running the latest OS versions and latest DJay Pro AI versions on all devices. I’m using an iPad Air 4 and a MacBook Air M1. I’m using a 4 channel Vestax VCI-400 SE Ean Golden midi controller. I know that the VCI-400 can work as a standalone 4 channel analog mixer. I have the necessary firmware for this and have used it in this way before.

Perhaps I misunderstand how the External Mixer mode is designed to work. What I would like to do is to route the Looper audio only to Deck C or D on my VCI-400 instead of straight to the Master output. This way I could adjust the EQ, Volume and also pre cue the Looper output in my Headphones. The only audio routing options available within the External Mixer setup are ch 1-2 and ch 3-4 (see attached screenshot). From my testing using ch 1-2 sends the Looper output straight to the Master output and ch 3-4 sends the Looper output to the Headphone output. Within Internal Mixer mode I also have the choice of ch 5-6 which is the Microphone input (see attached). There are no options to select the individual Deck Channels A, B, C or D. Perhaps this is a limitation of my controller or perhaps I am trying to use the External Mixer mode in a way that was not intended. Can someone please provide some input or suggestions? Thanks.


Thank you for getting in touch. We were checking the issue internally. In the Internal Mixer Mode the Looper is directly being outputted to the Master (which is the Vestax VCI-400 in your case). External Mixers in general provide several channels to choose from which you can assign to designated decks, the Sampler and Looper. You would need a variety of channels to make use of the External Mixer mode, which I would not suggest with the VCI-400.

Is there anything limiting you from using the Master as Looper output in the Internal Mixer setup?

Hi Lukas,

Thanks for the reply. I normally do use the Internal Mixer mode with my VCI-400. However, I was hoping that with the External Mixer mode I could route the audio of the Looper to Deck C or D on my VCI-400 instead of directly to the Master Output. This way I would be able to pre-cue the audio from the Looper before playing it through the Master Output. Also this routing option would allow me to EQ, Filter and adjust the Volume level of the Looper from my controller.

there is so little discussion and answers here…I will contribute the best I can. I would guess that the VCI400 does not support true external mixing. Most “controllers” will have a stereo USB signal for master output and another for cueing. If it were designed for external mixing, I would expect at least 4 downstream stereo USB channel pairs. Controllers are generally designed to provide additional controls for mixing within the PC or laptop and then outputting the end product to the master outputs.

Hi Slak_Jaw,
I think about buying a used VCI-400 SE to use Djay Pro Ai and had the same idea you mentioned above… did you find a solution to your problem since May 2001?

And I have a second question. Did you have any other problems with the VCI-400 SE (Ean Golden Edition) in combination with Djay Pro Ai? I heard the midi mapping (by Ean Golden/DJ Techtools) was different to the standard Vestax mapping?

Or maybe the Algoriddim ream have some informations about the compatibility?

Looking forward to hear from you
Best LeroyB

Hi guys,

Please note this controller should be used in internal mixer mode. This means it doesn’t have a channel for the looper. Our apologies for the inconvenience this might have caused you.

Cheers, G

Hey LeroyB,

As Guillermo said, the VCI-400 needs to be setup with internal mixer mode to work properly. So I was never able to get the Looper audio routed to a specific channel for pre-cueing or anything like that.

As for the VCI-400 SE with DJay Pro AI, it works great! I have done a bunch of customization to the default midi mapping provided by Algoriddim to suit my DJing style and workflow, but the default mapping works well. Plus it’s quite easy to customize the midi mapping with DJay’s midi learn functionality. I think you’ll be very happy with the VCI-400 SE. If I could find a new one in a box, I’d buy a second one. I think it’s still one of the best 4-channel controllers for DJay. It’s extremely well built (I’ve been using mine for 10 years), has pro audio inputs and outputs and has a lot of controls in a small form factor so it’s very portable. I also have a Denon Prime 4 which is awesome, but definitely not easy to carry to gigs. Good luck!

Hi Slak_Jaw, hi Guillermo,
Thanks for your feedback. I wish I could handle the looper as Slak_Jaw mentioned, but anyway… I think I will try this setup. Thanks a lot.
Best LeroyB

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You’re welcome LeroyB. Yeah it would be nice if Algoriddim at least gave us the option to pre-cue the Looper audio in the headphones before sending the audio to the master out. I think I would use the Looper more often if there was a way to pre listen to the audio.

This is the thread for that request, I noticed it was closed due to it being inactive for 1 year. I’ve re-opened it:


Thank for re-opening this @Guillermo


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