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H04S 1/00
|
Two-channel systems |
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H04S 3/00
|
Systems employing more than two channels, e.g. quadraphonic |
|
H04S 3/02
|
Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other |
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H04S 5/00
|
Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation |
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H04S 5/02
|
Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation of the pseudo four-channel type, e.g. in which rear channel signals are derived from two-channel stereo signals |
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H04S 7/00
|
Indicating arrangements; Control arrangements, e.g. balance control |
