Source:

Recorded from the 15th row dead center on the floor with the microphones about 10 feet apart; Source: 2 Sennheiser MKH 406 TUD microphones > Sony D5M (w/ Dolby B, Bias @ 70us on 3 TDK MA C-90 tapes); Copy of masters: Sony D5M (w/ Dolby, Bias @ 120us) > Akaii GX-570 D2 (w/ Dolby B, Bias @ 70us on 2 TDK SA C-90 tapes)