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| tituscomputer.com | Methods of stereo recording | Binaural recording | Stereo Recordings | Sound recording | Broadcasting in stereo | History | Common usage |
Stereo Recordings
Playing back stereo recordingsStereophonic sound attempts to create an illusion of location for various instruments within the original recording. The recording engineer's goal is usually to create a stereo "image" with localization information. When a stereophonic recording is heard through loudspeaker systems rather than headphones, each ear of course hears sound from both speakers. The audio engineer may and often does use more than two microphones, sometimes many more, and may mix them down to two tracks in ways that exaggerate the separation of the instruments to compensate for the mixture that occurs when listening via speakers. |
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Descriptions of stereophonic sound tend to stress the ability to
localize the position of each instrument in space, but in reality
many people listen on playback systems that do a poor job of
re-creating a stereo "image". Many listeners assume that "stereo"
sound is "richer" or "fuller-sounding" than monophonic sound. This
is inaccurate — stereo and mono can have equally detailed abilities
to play recorded notes. The spatial illusion is what sets stereo
recordings apart from mono recordings. When playing back stereo recordings, best results are obtained by using two speakers, in front of and equidistant from the listener, with the listener located on the center line between the two speakers. The ORTF stereo microphone system is a microphone technique used to record stereo sound. It was devised around 1960 at the Office de Radiodiffusion Télévision Française (ORTF) at Radio France. This technique uses two small cardiod microphones, their capsules spaced by 17 cm, the angle formed between their bodies being 110°. The microphones should be as similar as possible, preferably a closely-matched factory pair. In practical arrangements the distance and angle can be manually adjusted slightly by ear for the best sound, as this will vary depending on room acoustics, source characteristics, and so on. These inter-channel signals have nothing to do with interaural signals which come only From artificial head recordings. Even The spacing of a = 17 cm has nothing to do with interaural ear spacing. The recording angle for this microphone system is ± 48° = 96°. The result is a realistic stereo field that has reasonable compatibility with mono playback. Since the cardioid polar pattern rejects off-axis sound, less of the ambient room characteristics are picked up. This means that the mics can be set back further from the sound sources, resulting in a blend that may be more appealing. Further, ORTF is easy to achieve, as purpose-built microphone mounts are available. Methods and media for sound recording are varied and have undergone significant changes between the first time sound was actually recorded for later playback until now. |
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| tituscomputer.com | Methods of stereo recording | Binaural recording | Stereo Recordings | Sound recording | Broadcasting in stereo | History | Common usage |