Complex sentence: Aside from being a manager, Diane Ventura remains as the songwriting partner of her husband, Ely Buendia, and has written a number of the band's songs and has shared her singing voice as both lead and backing vocals.
Split into simpler sentences: Aside from being a manager, Diane Ventura remains as the songwriting partner of her husband, Ely Buendia. She has written a number of the band's songs and has shared her singing voice as both lead and backing vocals.