I heard “Kieth Don’t Go” for the first time due to @Torben_Rick playlist here:
What an amazing track!
I have lots of reference tracks.
For clean bass “scales”, I go for “Circumpsection” by Daev Martian
For proper stereo placement, I go for tracks that have phase effects, such as “Late Home Tonight, Pt. 1” by Roger Waters or “Exhale Inhale” by Aurora.
My torture track is “First Light Of Winter” by Miranda Lee Richards. There is a bass bloom exactly 8 seconds in. In a perfect location, the bloom is 3-D, but in practical room locations, you can hear the tone change but no 3-D bloom. In lesser headphones, I don’t hear a tone change at all! It is my favorite torture track. 