Melodic progressive house atmosphere

I want to make melodic prog house and I start with the chords and its ok but I cant put an atmosphere in my tracks like guys like mossy and roald velden do.just to hear some examples:br
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https://www.youtube.com/watch?v=Qe247gX_lnUbr
https://www.youtube.com/watch?v=oczyl6W3Ja8br
https://www.youtube.com/watch?v=7RHPLQDegtUbr
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what chord do they use to create the atmosphere?what notes?they use this in a lot of tracks.really apreciate some help hehehe

Valhallah Shimmer.br
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tech tip uploading today on how to do similar effects with ableton

but you havent covered the notes they use to create those atmospheres :S really would love to see an example of a progressive track with that atmosphere…

They’re just basic chords man.br
That first video is E Maj 9, heavy emphasis on the ninthbr
The second video is G# Maj, the root and third drone up highbr
The third video is also G# Maj, sounds like a suspended 2nd or a 9 chord, it’s all kind of the same sound though, just emphasis on different notes in the same chordbr
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You probably like the sound of the 2nd/9th. Try some big ol major ninth chords. Spread them wide over 2 or 3 octaves. Make some real soft plucky sounds and just pile that reverb and shimmer on.