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.

Life is short so make sure you spend as much time as possible on the Internet arguing with strangers.

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