Complex sentence: The album was preceded by two remix EPs for "Ventolin", one of the harshest tracks on the album, featuring a high-pitched frequency which presumably mimics the sound that asthmatics hear when they overdose on salbutamol.
Split into simpler sentences: The album was preceded by two remix EPs for "Ventolin", one of the harshest tracks on the album. The track features a high-pitched frequency which presumably mimics the sound that asthmatics hear when they overdose on salbutamol.