You’ll need that too for setting & checking test signal levels!
A good start is with miniDSP UMIK-1 USB mic (make sure to use it’s calibration file).
https://www.minidsp.com/products/acoustic-measurement/umik-1
And then follow everything previously mentioned i.e. using a separate program for measuring and generating the convolution files for HQP to use/convolve. Either REW, Audiolense, Acourate.
Detailed questions on using each of those programs are best posted in their specific places, for the best help.
REW: A guide how to do room correction and use it in Roon
Acourate: https://www.audiovero.de/acourateforum/
Audiolense: https://groups.google.com/forum/?hl=en?hl%3Den#!forum/audiolense
Good luck!