In reference to the "pad" sounds a synthesizer can make:

What is a pad sound?

What are pad sounds used for?

What is a pad sound composed of?

If I wanted to make my own pad sound, how would I go about it?

What pad sounds I have heard seem airy and go a long ways to imparting
atmosphere. I am guessing that there is a little bit of delay (a chorus
effect) and perhaps some further delay on top of that for echo effects. As
to what makes the basic pad sound, I can only surmise that you select two or
more instruments/voices and have them play harmony in whole notes or longer.
Some of the pad sounds I heard have orchestral qualities.