Recordings were made with two microphones. The close-talking microphone (Sennheiser HMD414-6) fed directly into a separate pre-amplifier (Symetrix SX202) and then to the analogue line input of a workstation (Silicon Graphics Iris Indigo) which, in turn, was connected to the workstation's internal A/D converter. The desk microphone's signal (Canford C100PB) first fed into a built-in pre-amplifier and then into the analogue line input. The technical specifications of the recording equipment is given in Appendix B.