|The Surround Direction and Base Width Controller Dimensions is a unique 5.1 mastering device that allows the modification of the spatial components of surround program. The device is based on the M/S stereo technology that has been expanded to be used with 5.1 surround sound system Additional, fully parametric EQ bands in the M/s chain enhance to possible modifications while the elliptic equalizers maintain stereo and mono compatibility
There are separate sections for the control of the Width and the Depth of the program. In addition the Elliptic EQ section allows the modification of the low frequency crosstalk between left and right and front and surround independently. A Matrix section makes it possible to convert a 4 channel surround input signal into 5.1 format.
The unit converts the surround input signal into two M/S signals. The first signal describes the left to right relationship; the second signal describes the front to fear relationship. The operation of this processor has no effect on the LFE channel, and it is not integrated into the regulation, its signal bypasses all the processing elements. However, depending on the operation of the unit, the output matrix can affect the behavior of the LFE channel. In addition, there are three switches, which allow additional manipulation of the signals at the input. FRONT-REVERSE and SRD-REVERSE switches the left channel with the right channel, and the left surround channel with the right surround channel respectively. The DEPTH REVERSE switch switches the left and right front channels with the respective surround channels without affecting the center channel.
The SURROUND-BASE and SURROUND-DIR operate like a normal stereo direction mixer, but only for the surround channels. This process is a part of the spatial direction mixer, and is used to adapt the width and the direction of the surround channels to the front channels, and both pots operate as described above. The BASE pot allows the user to change the width of the signal from 0% (mono) up to 200% of extended base width. The direction pot is used to adjust the surround signal from normal (SC) to mono on the left channel (SL), or to mono on the right channel (SR). This pot is also used for the adaptation of an artificially produced stereo signal from a 4-channel input signal.