Editing Journey into Space (section)

== Sound effects ==
A variety of sound effects was used in the episodes, and played a major role. In addition to basic sounds, such as feet walking along a corridor or tunnel, more advanced effects were created, such as the mysterious haunting 'music' which is heard over the rocket's radio in many episodes of ''Operation Luna''.

The most distinctive effect was the dramatic rocket take-off, which was played at the beginning of each episode, and whenever necessary during the episodes. This was actually a recording of a [[jet aircraft]] at [[London Heathrow Airport|Heathrow airport]].<ref name="Round Midnight">{{cite episode 
|title=Interview with Charles Chilton |series=Round Midnight (with Brian Matthew) |series-link=Brian Matthew |network=[[BBC Radio 2]] |date=1989 }}</ref>{{Full citation needed|date=February 2020}} Often, this would be followed by a slowly ascending tone (representing the rocket accelerating), which "was actually a recording of a [[Vacuum tube|thermionic valve]] played through an [[echo chamber]] down at the [[National Physical Laboratory, UK|Physical Research Laboratory]] at [[Kingston upon Thames|Kingston]]".<ref name="Round Midnight"/> Other sound effects were created at [[Battersea Power Station]], and the sound made by the televiewer on board Luna was actually a [[Sonar|naval ASDIC]].<ref name="OL booklet"/>

The BBC had an echo chamber in the studio, which was greatly utilised during the episodes. Whenever the crew were in contact by radio with Earth control, or another distant location, the echo chamber would be applied to the voice of the remote character. Various sound effects were also created "live" in the studio. For example, in episode 8 of ''Journey to the Moon'', the crew hear a mysterious tapping on the outside of the ship; this effect was created "by tapping the needle of the gramophone pickup head, and playing that through an echo chamber".<ref name="Round Midnight"/>

The operation of the Martian "Brain" when compiling an answer in response to questions was represented by the sound of a 2000-type Director - a telephone call routing device used in large city Strowger type telephone exchanges.