What is "ORTF"?

ORTF

An abbreviation for Office de Radiodiffusion Télévision Française (French Radio and Television Office). Also a name for a specific microphone setup for near-coincident stereo recording with two cardioid microphones. The distance between the microphones is 17 cm (6.7 in) and the angle between the microphones: 110°, which to some extent, emulates the position of ears on the human head.

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Stereo and multichannel techniques

STEREO RECORDING TECHNIQUES AND SETUPS

Audio formats have developed over time. Starting with narrow bandwidth mono, moving on to various versions of two-channel stereo and finally to full-band, multi-channel immersive audio.

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