With the possible exception of spending a weekend camping with Pike-and-Shot era reenactors...I find that few things transport my imagination into the era than some rousing music from that period.
Even realizing that you can find virtually anything on the Internet, I really had no concept that I might find videos for original Landsknecht marching songs on YouTube!

That is, until the day that I was researching some truly fantastic Napoleonic French marches...which led me to Napoleonic Prussian Marches, and from there backward in time through the days of Frederick the Great to the 17th and 16th centuries.
Not only are these two interesting, rousing songs from the era, but the imagery in the videos gives us some nice visuals of troops familiar from the game!
The scenes in the videos are taken from movies (not sure which ones, sorry!) Hollywood hasn't exactly produced a wide selection of Pike & Shot movies, but the time period is popular with production companies in some European nations. I know that the Polish are quite proud of their forebear's Winged Hussars, and have made a number of films celebrating their martial prowess, including at least one that I've watched scenes from that deals with the Swedish Invasion. If you're interested, just try searching YouTube and you'll undoubtedly find them.
In the meantime...I hope you enjoy these!
"Unser Liebe Fraue" (Our Beloved Lady)
https://www.youtube.com/watch?v=mJSU0Fzj-BE
"Trum, trum, terum tum tum" (Drums, Drums, Drumming the Drums) (some nice black-armored Cavalry at the end. "Schwarze Reiters"? Kuirassiers?)
https://www.youtube.com/watch?v=F0yuPtlZtJQ