I know this is an older post but for anyone looking for a midi fader controller that reads this post I have a Studiologic SL Mixface and love it. I use it with Digital Performer 10 on an iMac running Mojave for transport control, automation, mixing volume and pan, and for controlling solo, mute, select and record enable buttons as well as sending MIDI CC data & UACC commands to control VI libraries & FX plugins like Spitfire, OT, Cinesamples, Cinematic Studio Series, Native Instruments Kontakt, VSL, UVI, Arturia, Korg Collection, Spectrasonics, Plugin Alliance, Waves, Eventide, Softube, and others.
It does not have automated motorized faders unfortunately and is more expensive than the Korg Nanocontrol2/Studio ($52/$132) and Akai Midimix ($89) units, but you get a lot more functionality and better feeling 🎚 faders for around $210. The SL Mixface can run on batteries
or USB powered and works over USB or wireless Bluetooth. It’s very cool as you can use it with a Mac, PC or iOS devices.
Unless one is spending way more for an automated motorized fader controller ie. Presonus Faderport 8/16, Mackie, Behringer, Avid, Icon, SSL, etc., I suggest spending more and getting the SL Mixface. I looked at Korg and Akai which are cheaper but felt I get so much more for not too much $$$.
I still have and use a motorized Tascam US-2400, but I wanted something I could place closer to me right on top of my 88-note MIDI keyboard controller for more control (dynamics, vibrato, expression, vibrato speed, release, tightness, reverb, mic mix volumes, articulations) when I play midi notes into my DAW. I use the Tascam for controlling transport control, volume faders and pan knobs in Digital Performer.
I still cannot believe that Tascam stopped making the US-2400 and FW-1884, which was way ahead of its time and could be extremely useful today still if Tascam simply released the 64-bit Mac driver that it already created for it so it could work on OS X 10.8-10.15 Mac computers. Release that Mac 64-bit driver already, Tascam!!