CINMIDI

The CINMIDI application was designed to be a command-line program that displays MIDI messages to the computer screen as they enter from an external MIDI instrument.
The binary MIDI input bytes are converted to their ASCII numeric equivalents when displaying on the screen. Cinmidi stands for "Console MIDI INput".
Here is a synopsis of the cinmidi command:
Display / Record MIDI input data.
Usage: cinmidi [-a][-i][-x|-d|-2] [-o output][-p port]

Options:
-a = display MIDI timing in absolute time instead of delta time
-i = dont display interpretation of MIDI message as comments
-d = display MIDI bytes in decimal form
-x = display MIDI bytes in hexadecimal form
-2 = display MIDI bytes in binary form
-n = do not display note-off messages
-f string = filter out specified MIDI commands (e.g. "bc" will
filter out control change and patch change messages)
-c string = filter out specified MIDI channels, offset zero
(e.g., "09AF", filters channels 1, 10, 11, and 16)
-p port = use the specified MIDI input port
-l = list MIDI input ports and then exit
-o filename = send display to file as well as to screen
-u string = specify a user name for the header information
-s = display time values in seconds
-k = disable keyboard input
--options = list all options, default values, and aliases