For the Firestudio:
First, make sure that you have the Presonus software downloaded and installed (if you don't already)
http://www.presonus.com/products/FireStudio/downloads
Then, open up Pro Tools, click the "Setup" menu option, "Playback Engine...", and then select "Presonus Firestudio" from the top dropbox. To customize the i/o, go to "Setup", "I/O...", and adjust things from in there.
Best of luck! You'll love it.
__________________
-Ryan Young
•2019 Mac Pro 3.5 GHz 8-Core Intel Xeon W - 48 GB 2666 MHz DDR4 (OS 10.15.5) •HD Native PCIe, HD Omni, 192 I/o, Pro Tools Ultimate •Avid S3 + Dock •Blackmagic Intensity Pro (HDMI) •5.1 Room with JBL LSR4300 series
Additional Systems
•2010 Mac Pro 2 x 2.66 GHz 6-Core Intel Xeon - 48 GB 1333 MHz DDR3 (OS 10.14.6) •HD Native PCIe, 192 I/o, 96 I/o, Pro Tools Ultimate •McMix (x4), McControl (x1), JLCooper Surround panner for D-Command ES, Avid Control •Blackmagic Intensity Pro (HDMI) •7.1.4 Room with JBL LSR4300 series
•2017 MacBook Pro 2.8 GHz i7 - 16 GB 2133 MHz LPDDR3 (OS 10.14.6) •HD Native TB, HD Omni, Pro Tools Ultimate •McMix (x1), McControl (x1), Avid Control * or * D-Command ES Main Unit •Fed into whichever system is the main system