yes, exactly. Passthrough is the highest priority thread on the device, preempting anything else.

Do you know if there is any (noticeable) added latency when doing passthrough?

So I took measurments - it's not as great as memory served.

In order to get accurate timestamps, processing midi IN takes priority over OUT.

So OUT can vary in latency between 5ms and 60ms. An unfortunate amount.

Improvements can be made here. I'd recommend a splitter if you need low latency.

Do you have any suggestions or experience with such devices? I’m using a DP with USB to host only, connected to a computer/DAW. Ideally I would like to be able to continue to have it connected to the DAW, but also connected to the Jamcorder for seamless recording :)

Yes you can do that.

Buy a standard midi to usb adapter (~$20), then do:

piano -> (usb) -> Jamcorder -> (midi out) -> adapter -> (usb) -> pc

It should give acceptable latency for real-time recording.

made improvements. It's now about 12ms constant. Usable for real-time playback.

I think its well under 1ms, but it's can't remember off-hand.

But definitely not humanly noticeable.