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hi, you're welcome

yes it's perfectly possible to do what you ask, recording and playback several tracks at once.

but first you'll have to sort out that horrible MIDI latency/jitter problem, which is huge and impossible to work with anyway...

maybe the problem is in the midi-usb interface and/or pipewire(-jack) I presume... you'll need to describe in way more detail how exactly are you wiring the MIDI-keyboard to the computer and ultimately to qtractor...

is that the original midisport 2x2 of the beginning of the century (old midiman, lime green case) or is it a recent one (anniversary, black case)? believe the former needs a firmware update to run on Linux while the later is fully usb1.1 class-compliant so no need for special driver software... but really don't know whether the problem is in either end or both...

you most certainly need to tune up your kernel for low-latency (eg. boot option preempt=full), review your pipewire(-jack) configuration and probably force a qtractor's midi queue timer to the highest resolution (HR) if not the system default...

seeya