How to make a MIDI loop with smooth transition?

If you need to loop a finished audiofile 50 times, then you need a good sample tool, that creates perfect loop-points for you. You need to think smart here, as you will not solve this with a midi-part and i am pretty sure, that no other DAW can solve this with midi alone. Make your midi-part a sample and edit that, till you have nice loop-points. If you export/convert to audio, make sure it is long enough, to have the fx and tones fade out at end.

Hello u-man!

Sorry, I do not understand, I am new to Cubase (6 months ago).
What is a sample tool?
When I finish the midi part I export it in the audio file.
How do I make midi-part a sample?
All I can think of is to finish midi ( basically solo piano with a pad ) with 1 long chord and match velocities with the beginning chord of the song.
There I make the cut/end of the locator, there is no fade in/out. It should be 1 continuos song for 3 hours ( same velocity - no lowering the sound in the crossfade)

Then I put a song as audio file and copy it 50 times.
In the Power Director I put sort of crossfade between audio tracks but it is not doing a good job, as it is a video program not a music program.
I am really confused about how people make loops of songs.
Is there some sort of program to crossfade/blend two audio parts?

I searched internet but can not find an explanation.

Thank you,

Marijana