i did this for fun because i love SNS, in case you couldn't tell
If you want to see my take on the extra songs (Satanic Static, Blinded by Sin, Really Darkened, etc.), then go here:    • FNF: Sunday Night Suicide - Extra Son...  

Sunday Night Suicide by: TheShipySea
Unhappy, Happy, Really Happy Suicide Mouse Designs by: Ulkarizers
Smile Suicide Mouse Design by: BlakeDude7

Original Unhappy, Happy, Really Happy, Smile by: Star_Lyt (The_Mayz)
Remastered Unhappy, Happy by: Star_Lyt (The_Mayz)
Remastered Really Happy by: TheNewMayz (same person, under a different alias)
Remastered Smile by: BlakeDude7

CHANGES I MADE (This is why the video exists in the first place):
0:00 Unhappy:
- Used the Alternate Instrumental found on the SNS funkipedia page (except for the very last note which is mashed up with the original Remastered Unhappy as well)
- Overlayed the original Unhappy Instrumental

1:09 Happy:
- Used the original Remastered Happy up until Mickey's first turn, when it transitions into the newer Remastered Happy (or Happy Encore by the file name) on the SNS funkipedia page
- Overlayed the original Happy Instrumental (which is also pitch shifted up 1 semitone after Mickey's laugh)

3:06 Really Happy:
- Made Boyfriend WAY louder (why was he so quiet in the original)
- Overlayed the original Really Happy Instrumental during David Near's "Hush little human" segment
- Reversed the scream and made it shorter to be closer to Candle Cove's scream (plus I just like the effect of it fading in)

6:01 Smile:
- Made the last note fade slightly faster (so the ending isn't quite as long)
- Overlayed the original Smile Instrumental and Voices