My problem with all of these mixer/recorders is no midi. I almost bought one a few years ago before I realized nowhere in the description did they mention midi so these ads can fool you if you're assuming they include it.
Bob
Not all of the mixer/recorders are without midi. True, now days, most don't. All will accept a midi device's audio output.
The original version Tascam DP-24/32 stand alone multi track recorders had CD burners/players and MIDI IN/OUT. Later generations including the current versions have neither.
These first generation units also had slave/master and midi control capabilities.
All of the digital Behringer XR-series Tablet Controlled Mixers - XR12,XR16,XR18 and X18 Desktop have MIDI IN/OUT