Looking for a simple, straightforward ‘how-to’ on sending multi-track audio over USB to FL Studio 21 (PC). I thought the Play+ would somehow be detected when plugged in, but nothing obvious so far. Do I actually need an audio interface just to use this function? I’ve never attempted audio over USB to FL Studio with any other device, so this is all new to me.
Hey @terminalsigh , welcome to Backstage 
I personally don’t use FL Studio, so i won’t be able to provide a super detailed walkthrough of the setup but i think i can give you enough of the important bits so that you should get it up and running.
Under Windows it is necessary to use ASIO4ALL to use the Play+.
FL Studio seems to already have ASIO4ALL Support built-in according to this official manual/guide link:
https://www.image-line.com/fl-studio-learning/fl-studio-online-manual/html/envsettings_asio4all.htm
So i would follow those steps and you should actually be able see and activate the Play+ in the ASIO Panel.
If you need to install ASIO4ALL manually (again, not sure if that is necessary with FL), here the link to the official site:
https://asio4all.org/about/download-asio4all/
(yes i know, the site looks scammy as hell, but this is the official site 
)
Let me know if you get stuck during any steps and i’ll try and help you as best i can.
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Setup an Aggregate device first by looking in the PDF manual and searching for “Aggregate”.
Then you need to setup the FL Stuidio mixer to work with it. Here is a zip file that contains a PDF with instructions I wrote for myself on how I get it to work on my mac, that might be enough to figure it out on PC. Might need to zoom in a lot to clearly see what is occurring.
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