RMSC

the weeknd - niagara falls + take me back to la (slowed + reverb)

the weeknd - baptized in fear + open hearts (slowed + reverb)

Simple RingMod sidechain VST3 plugin (Free; Windows/MacOS)

the weeknd - cry for me (slowed + reverb)

the weeknd - red terror + without a warning (slowed + reverb)

Zigeunerweisen ("Gypsy Airs"), Op. 20 (Anne-Sophie Mutter)

the weeknd & anitta - sao paulo (slowed + reverb)

Bach

the weeknd - drive (slowed + reverb)

Corcovado