A Minor / Major 7 chord, written min(maj7), consists of a minor triad on bottom with a major 7 above it. It differs from a typical min7 chord in that the 7 is natural instead of flat (b7). It uses the scale degrees 1 b3 5 7 from bottom to top.
This piano lesson will provide you with beautiful new voicings and ideas for the song My Funny Valentine. We walk through a good portion of the song chord by chord, discussing some new and different voicings, as well as classic ways of looking at the chord changes.
It's also important (and often tricky) to get that Cmin(maj7) walk down write.
My Basic Piano Voicings course with video examples will leave you with a much stronger arsenal of voicings. Get your copy here: http://jazzlessonvideos.com/piano