Complex sentence: While in the army he initiated a written correspondence with Zlatan Čehić, Paradoks' bass player, and they started exchanging packages containing audio cassettes-Zlatan was composing and Tifa was writing the lyrics.
Split into simpler sentences: While in the army he initiated a written correspondence with Zlatan Čehić, Paradoks' bass player. They started exchanging packages containing audio cassettes-Zlatan was composing while Tifa was writing the lyrics.