Complex sentence: After messing around with beat machines and a small keyboard in 1986, he began recording the track "Altered States" while still a high schooler, releasing it on Armando's Warehouse Records in 1990.
Split into simpler sentences: After messing around with beat machines and a small keyboard in 1986, he began recording the track "Altered States" while still a high schooler. He released it on Armando's Warehouse Records in 1990.