A nightcore "edit" is a version of a track that increases the pitch and speeds up its source material by approximately 35%. This gives an effect almost identical to playing a 33.3 RPM vinyl record at 45 RPM. This 35% increase in RPM causes the note C4 to become slightly lower in pitch than the note F#4 (261.63Hz becomes 353.19hz) which is an increase of approximately 5 and a half
