The dialogue for the man and woman heard by Clara in the barn was recorded at the Goldcrest studio facility in London on Tuesday 24 June 2014. A single new orchestral cue, composed by Murray Gold, was recorded for Listen running to 2’21”; this was performed by the BBC National Orchestra of Wales conducted by Ben Foster on Wednesday 16 July at Hoddinott Hall in Cardiff. For sound design, Douglas Mackinnon wanted a specific atmosphere for the sequence of the apparent ‘attack’ on Orson’s base; the nature of the menace needed to be kept oblique… possibly being the sounds of the space vessel cooling and settling at night or maybe a true, physical menace. As such, sound effects editor Harry Barnes included some animal noises in the sound mix for these scenes.
