Why is this particular chord a minor 7 voicing you should know?
I personally did not know about it before just a few months ago. Sure, I had heard it many times.
Especially from Herbie Hancock and many others. So, I knew about it well, but had never taken the time to practice this voicing in all the keys. Now I have, and the voicing is stuck in my fingers together with the million other combinations.
The reason for me now to introduce the minor 7 voicing you should know to you who are reading this is that if you can manage to really get this, you’ll gain more freedom to play jazz piano quicker than I. I’ve been playing for a while now, and still found this “basic” minor 7 voicing.