Multiple instruments

[Celtic46]

When you put the same, lets say, trumpet on two tracks
they sound like 1 trumpet double the volume/velocity.
Is a small midi delay possible or other trick/effect to make
them sound more individually.

[jestermgee]

What is your end goal with having 2 trumpets in your mix?

Are they the same trumpet?
Are they different but playing the exact same part?
Are you wanting to create a stereo field or a fuller sound?

If they basically sound the same when played together, just louder, do you really need the second track?

Assuming for unknown reasons you do, you could try and increase the delay of one track to make it a little later than the other. You could then pan one track a bit left and the other a bit right and that will create a bit of a stereo field.

Personally i'd do some work on the actual MIDI tracks of both to slightly adjust the notes to be at different grid positions, Just a few ticks of each note to be a little off the grids so it sounds a little more natural as if you have 2 different players. That would be the best option but the most time consuming.

[Celtic46]

Indeed, like 2 players or more. They sound different then one.
I found no MIDI delay-effect what could do the trick.
Manual delaying 6 players sounds like fun.

[TLW]

Another approach to the MIDI is to duplicate the tracks a few times and add varying amounts of groove to them. Putting a sampler/synth on each and eqing and panning each track slightly differently helps as well.

Or convert the track to audio, duplicate it as many times as you like then use Utility or the track delay to add varying tiny amounts of delay both forwards and backwards in time - a very few milliseconds is usually enough.

Or run a little clean chorus or doubling effect on the audio.

If you’re more than one sampled trumpet/whatever then using different ones for different tracks can help as well. Or using slightly different envelope and filter settings on the samplers.