[mophilly]

Thanks to all who have posted. I really appreciate the suggestions and info.

For the record, here is the current details from my PT project.

-- Hardware and Software
Pro Tools 2019-12
iMac (late 2013) running MacOS Catalina (10.15.2)
Yamaha P-105
Focusrite Scarlett 18i8 2nd Gen

-- Pro Tools Setup
Hardware: Scarlett
Playback Engine: Scarlett, HW Buffer size 256 Samples, playback cache 1GB
Peripherals: installation defaults
I/O: default paths to Scarlett; all other settings default on installation
MIDI setup:
MIDI Studio: Scarlett and a general device that I named as piano. Manufacturer is Yamaha, nothing in model
MIDI Beat Clock: “Scarlett” enabled, “Expand!2 1” disabled
MIDI Fitler: defaults
MIDI Input Devices: Only Scarlett listed and it is selected

-- Track: 1 (works)
Input: Input 1 of Scarlett, connected to Shure microphone
Output: BO12 (Scarlett analogue 1)
Instrument: nothing
Inserts: AIR non-linear reverb
Sends: none

-- Track: 2 (not working)
Input: no input… what goes here? input, bus or plugin? plug in is greyed out.
Output: BO12 (Scarlett analogue 1)
Instrument: All, none
Insert: multi-channel input > EQ > AIR EQ Kill
Send: none