ErikSimon: Sorry it took so long to respond but I just had a chance to to test out your suggestions.
1. I checked the global tuning and it's fine
2. Then I metered/test tuned the individual instrument (Steinway Piano) and it was tuned fine too. It doesn't appear that the Steinway can be stretch-tuned, and I did not see a way to shift the pitch down using the keyboard I recorded with (Korg NanoKey2)
3. I went into the Korg Controller software and it seems that everything was fine there too - Sustain, Modulation, Pitch etc all normal values
The song is a dark piece where I used single notes on the piano with long sustain values (i.e., held the sustain pedal down for a long time so the notes hang with a long decay)
The Steinway Piano channel strip is untouched from initial load, i.e. > Channel EQ and Space Designer using "2.3 At The Opera 2.270s Stereo". It is NOT bussed to another Aux for additional processing. See more below.
I should note that many of the other instruments on the song are bussed to an Aux using/sharing a Stereo Designer with a "1.3s Soft Plate 1.224s Stereo" setting.
I also tried bussing the Piano to the reverb used by other instruments in the project and it doesn't change the effect, my impression.
It's not that the Piano sounds really "bad" - it's just that to my ears It sounds just ever so slightly "off" - like the sustain note just doesn't quite hold up and is flat at the end of the hold. But the tuner says no. I have pretty good ears - knock on wood. Listening again I still get the same impression, but I'm also thinking that my ears may be contrasting the sharp attack vs the long sustain and I'm hearing some kind of ghosting that only (to me) "Sounds" a little flat - kind of my own personal psychoacoustic sensation/phenomena.
I really appreciate the suggestions and the help. I learing additional parameters and where to look to investigate - always a good thing. Nice graphic w/ arrows!
As an experiment, would it be possible to bounce the MIDI Piano track to audio and re-pitch the audio to see if I can achieve some (perhaps mythical) different sound?
Just a thought.
Thanks again!
Animist08: I took your suggestion too and checked the instrument's assignment. Looks fine. Weird! Thanks!