Bob’s explanation is right on. I will add to his last paragraph by saying that most all DAWs will allow you to write in MIDI commands. Thus if you don’t have a MIDI controller you still can those commands. I do this in the PRV, piano roll view, however it can be done in the MIDI edit list view also, at least in Sonar.

Although I can do this it is easier using a keyboard MIDI controller.

FWIW-I use a wind controller, EWI-USB, for horn and monophonic synth inputs. This way I can control volume (CC2), velocity (air pressure), pitch bend (mouth piece + thumb controllers and a few other assignable CC controls simultaneously.

Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware