As a guitar player, to understand OP-1 Field check out this video, and his others:
https://www.youtube.com/watch?v=cTv8k8_9jXk
iPad is great. Love mine. iPad is a computer. OP-1 Field is a four track, and an instrument. Mentally there is a huge divide, at least for me. Sometimes I reach for Logic. Or Ableton. But mostly the Field it is.
Itās normal you say iPad is a "computerā as here is a hardware forum.
iPad, even the most budget line, is a touch sensitive instrument, there are many iOS midi controllers and some allow you to ācreateā your own prefered instrument layout.
Here is a virtual 9 string 12 fret non-existing guitar-like controller, mine is a a 10 string 8 fret as it is fully adjustable. Just a $10 app called Velocity Keyboard. Buy it and your iPad will become an instrument too : )
a 4 track recorder? check out Loopy Pro for $30
a simple demo
an advanced demo
Take a break from the hardware and have a look at the endless yet growing choices on iOS/iPadOS
iPad is a portable music universe with midi controllers, instruments and production plus good built in speakers or you can plug in your prefered headphone through the usb-C/lighting port.
iphone is a computer? Or a toy camera? Or everything? It is up to the users.
edit: typo
I am super familiar with what iPad has to offer music wise. I use mine all the time.
Back in 2010/2011 I still worked in a music store and wrote to Apple and requested access to the iPad product line for music purposes, which they granted. We sold Akai and Alesis iPad related hardware accessories even. iPad can also be a great control surface for a daw.
But using an iPad feels like using a computer. OP-1 Field does not. Itās a portastudio and some classic synths/samplers.
I donāt expect to change your opinion, but for some people, especially for myself itās the most immediately accessible and inspiring piece of music gear I own, followed closely by my Nord Grand, which I often use it with. I also use it with the iPad, sometimes.
So with an updated OP-1F and a DT2 and only a USBB to USBC could I ? ā¦
Iām less sure on that second one but it would be pretty useful to use OP-1F as a little keyboard for a DT voice. The velocity sensitivity is surprisingly nice and could go far with those velocity mods.
Additionally, it would be awesome to sequence the OP-1F with DT2 while also recording it back as a loop onto the DT2.
Can anyone confirm some of these specific use cases? Iām waiting on my DT2
Iām going to test this today. 
My DT2 arrived yesterday but the USB port has been occupied transferring samples (prepare for that to take days). Donāt know if Iāll get a chance to test until Sunday but I really hope it works as you describe. The DT2 also has the ability to send only the external inputs to USB so Iām hoping Iāll be able to play guitar along with the DT and not commit the DT sounds to tape. 
This should all work.
For this pairing, the only things that I wish for are:
Nice, yeah those would be welcome additions.
While I mostly plan on recording audio between units or using OP-1F simply as a utilitarian keyboard,
I wonder how recording an OP-1F midi sequence would work on DT2. I imagine any note based things would be captured just fine into the DT2 sequencer, but I think swing might start to create a problem. I happen to love some of the OP-1F swing settings on the endless seq.
Unless its literally just as if I were playing it into DT myself with a loose feel, then the microtiming would capture this just fine if Iām recording unquantized.
Lots of ideas to test out!
I only had the time to connect the DTII with the op-1f once so far, also without having the lastest op-1f update installed, but they are a match made in heaven. Itās so nice to have them synced up and record sections of the tape of the op-1f straight to the DTII, all in time and perfectly cut loops to sequence and process further in the DTII. Back when I had the ogDT and the og op-1 in 2018, I could only dream of having those two instruments working together like that. I canāt stress enough how much I appreciate having these upgraded versions, both in stereo, and with more than enough memory to not have to start up my laptop in months. Although I probably should back my shit up from time to time, just to be safe 
Happy to report that with the latest OP-1 Field update we can easily pass Audio from the OP-1f to the DT2 over USB and Midi keys play the DT2 from the OP-1F.
Also happy to report that you can record audio over USB from the DT2 to the OP-1F.
So enjoy this workflow when it arrives 
Also, you can easily sample into the DT2 over USB while the track is playing on the DT2, so you can record while the groove groovesā¦
I guess there is no power going to the OP-1 from DT?
Hrmmmā¦the little green light is on the OP-1f is onā¦so I guess that it is leaching juice from the DT2 
I picked up this cable so no dongle or HUB would be needed:
https://www.amazon.com/dp/B086ZGKYH8?psc=1&ref=ppx_yo2ov_dt_b_product_details
Quick Snapshot:
Does this update also change how the OP-1 F monitors external sources ie. can you now do external FX without howling feedback?
Ah cool that it powers it! Yes also replaced all my Elektron - Audio devices with USB-C!
Unfortunatelly not. I think TE just doesnāt want to do it
You can record external effects, just not monitor them while doing so. The signal path goes to the recorder before the mixer. So turn down the mixer level for the track youāve chosen for recording, and you wonāt get feedback. You can adjust the recording level on the tape page still, and check itās not clipping etc.
Has anyone figured out how to select your Audio Channels over USB with the new update?
Tip(s):
If youāre recording audio in while playing midi out, youāll want a silent patch so youāre not also recording the internal synth.
Easiest way is a sample synth preset which is silent or you can just turn the sample gain down to nothing. So itās silent. Then you play and no sound is heard from the external engine, midi goes out to your gear and you can record external audio in.
Iāve saved this to preset slot 2.
Present slot 1 contains a vocoder preset adjusted to not modify the audio at all, then lets me monitor external audio with an insert effect. I think you canāt use that as the silent midi trigger preset because playing the keys triggers the vocoder.
Iāve not yet connected anything class compliant with more than 2 inputs. I saw someone say here (or op forums?) that the input options appear in the main system settings, not on the input page. But Iāve not seen that, probably as Iāve had no more than 2 inputs connected.
The only thing I have right now with multiple inputs is a Zoom R16, which is not class compliant so that wonāt work.
Iāve tried with a ni koplete audio 6 interface. On the input menu, you can then select pairs of inputs 1+2, 3+4, etc with the ochre knob.
