PilotGav
Can you "print" it to an Audio file? Then you can compress it as you usually would.

Personally I think Pilotgav points squarely to the elephant in the room here.
 
Perhaps I am alone in this opinion, and to each their own, but it it seems to me that 'midi compression' is little more than a fairly ordinary imitation of the actual dynamic range control of an audio source that is traditional compression. Manipulation of midi note velocities changes the tone and texture of the sound, often triggering entirely different samples rather than just limiting dynamic range. It's a bit like saying playing a passage more quietly equates to compression.  It really doesn't.  
 
This is not to belittle the extraordinary control that midi affords us - I'm a big fan! I just see compression as one of the most important sound shaping tools in a producers arsenal that is more than worthy of the 10 seconds it takes to bounce a midi track to audio:)

tenfoot
Perhaps I am alone in this opinion, and to each their own, but it it seems to me that 'midi compression' is little more than a fairly ordinary imitation of the actual dynamic range control of an audio source that is traditional compression. Manipulation of midi note velocities changes the tone and texture of the sound, often triggering entirely different samples rather than just limiting dynamic range. It's a bit like saying playing a passage more quietly equates to compression.  It really doesn't.  

+, replacing audio compression with MIDI compression (or in other direction) is a bad idea.
 
My use cases for MIDI dynamic range manipulations (and the reason my plug-in exists) are:
* the recording was done with one "instrument" (f.e. DP with local sound) but the track is used with another instrument (especially when that is no longer "a piano"). Hitting "forte" with one finger on piano can sound strange with an instrument where achieving "forte" required much more effort
* it is rather difficult to correctly control MIDI dynamic range on small controllers, especially in the lower volume range. "Smoothing" lower range, "Expanding" middle range and "Limiting" upper velocity can produce more consistent sound
* for some "electronic" sounds, "human" touch in volume can be undesired while 3-5 discrete volume levels sound good
In all that cases Audio compression as well as simple MIDI volume limiting/scaling are not working.

tenfoot

PilotGav
Can you "print" it to an Audio file? Then you can compress it as you usually would.

Personally I think Pilotgav points squarely to the elephant in the room here.
 
Perhaps I am alone in this opinion, and to each their own, but it it seems to me that 'midi compression' is little more than a fairly ordinary imitation of the actual dynamic range control of an audio source that is traditional compression. Manipulation of midi note velocities changes the tone and texture of the sound, often triggering entirely different samples rather than just limiting dynamic range. It's a bit like saying playing a passage more quietly equates to compression.  It really doesn't.  
 
This is not to belittle the extraordinary control that midi affords us - I'm a big fan! I just see compression as one of the most important sound shaping tools in a producers arsenal that is more than worthy of the 10 seconds it takes to bounce a midi track to audio:)

^^^^this. And the fact that many VST instruments trigger different articulations at different velocities, so "compressing" the midi velocities may actually cause problems.
 
Dan

^^^ this this.. (lol)
 
volume is not equal to velocity.. compression is for volume