Complementary-pair equalizer

A method of processing signals comprising:

• Providing a first signal from a first position relative to an instrument and a second signal from a second position relative to said instrument, each of said first and second signals comprising a frequency spectrum including a plurality of frequency bands;
• Supplying said first and second signals to at least first and second signal processors, respectively;
• Selecting at least one of said plurality of frequency bands with said at least first signal processor and selecting at least one of said plurality of frequency bands with said at least second signal processor, wherein said selections are less than the frequency spectrum of the plurality of frequency bands for said first and second signals, and;
• Adjusting a level for the at least one frequency band selected by said first processor with said first processor, and adjusting a level for the at least one frequency band selected by said second processor with said second processor, such that an increase in level of said selected at least one frequency band in one of said first and second signals results in a decrease in level of said selected at least one frequency band in the other of said first and second signals, and said increase in level and said resultant decrease in level are performed independently of changes to other frequency bands in said first and second signal processors.

An apparatus for processing signals comprising:

• a first signal source adapted to provide a first signal from a first position relative to an instrument and a second signal source adapted to provide a second signal from a second position relative to said instrument, each of said first and second signals comprising a frequency spectrum including a plurality of frequency bands;
• first and second signal processors adapted to receive said first and second signals, respectively;
• said first signal processor further adapted to select at least one of said plurality of frequency bands, wherein said selection is less than the frequency spectrum of the plurality of frequency bands for said first signal;
• second signal processor further adapted to select at least one of said plurality of frequency bands, wherein said selection is less than the frequency spectrum of the plurality of frequency bands for said second signal;
• and
• the first signal processor further adapted to adjust a level for the at least one frequency band selected by said first processor, and said second signal processor further adapted to adjust a level for the at least one frequency band selected by said second processor, such that an increase in level of said selected at least one frequency band in one of said first and second signals results in a decrease in level of said selected at least one frequency band in the other of said first and second signals, and said increase in level and said resultant decrease in level are performed independently of changes to other frequency bands in said first and second signal processors.

A method of processing signals comprising:

• Providing a first signal and a second signal, each of said first and second signals comprising a frequency spectrum including a plurality of frequency bands;
• Supplying said first and second signals to first and second signal processors, respectively;
• Selecting at least one of said plurality of frequency bands with said first signal processor and selecting at least one of said plurality of frequency bands with said second signal processor, wherein said selections are less than the frequency spectrum of the plurality of frequency bands for said first and second signals;
• Adjusting a level for the at least one frequency band selected by said first processor with said first processor, and adjusting a level for the at least one frequency band selected by said second processor with said second processor, such that an increase in level of said selected at least one frequency band in one of said first and second signals results in a decrease in level of said selected at least one frequency band in the other of said first and second signals, and said increase in level and said resultant decrease in level are performed independently of changes to other frequency bands in said first and second signal processors, wherein a magnitude of said increase in level is equal to a magnitude of said decrease in level, and
• combining said first and second signals after said adjusting step.

An apparatus for processing signals comprising:

• a first input to receive a first signal from a first signal source and a second input to receive a second signal from a second signal source, each of said first and second signals comprising a frequency spectrum including a plurality of frequency bands;
• first and second signal processors adapted to receive said first and second signals, respectively;
• said first signal processor further adapted to select at least one of said plurality of frequency bands, wherein said selection is less than the frequency spectrum of the plurality of frequency bands for said first signal;
• said second signal processor further adapted to select at least one of said plurality of frequency bands, wherein said selection is less than the frequency spectrum of the plurality of frequency bands for said second signal;
• the first signal processor further adapted to adjust a level for the at least one frequency band selected by said first processor, and said second signal processor further adapted to adjust a level for the at least one frequency band selected by said second processor, such that an increase in level of said selected at least one frequency band in one of said first and second signals results in a decrease in level of said selected at least one frequency band in the other of said first and second signals, and said increase in level and said resultant decrease in level are performed independently of changes to other frequency bands in said first and second signal processors, wherein a magnitude of said increase in level is equal to a magnitude of said decrease in level, and;
• a mixer to combine said first and second signals from said first and second signal processors.

An apparatus for processing signals comprising:

• a first input to receive a first signal from a first signal source and a second input to receive a second signal from a second signal source, each of said first and second signals comprising a frequency spectrum including a plurality of frequency bands;
• first and second signal processors adapted to receive said first and second signals, respectively;
• said first signal processor further adapted to select at least one of said plurality of frequency bands, wherein said selection is less than the frequency spectrum of the plurality of frequency bands for said first signal;
• said second signal processor further adapted to select at least one of said plurality of frequency bands, wherein said selection is less than the frequency spectrum of the plurality of frequency bands for said second signal;
• the first signal processor further adapted to adjust a level for the at least one frequency band selected by said first processor, and said second signal processor further adapted to adjust a level for the at least one frequency band selected by said second processor, such that an increase in level of said selected at least one frequency band in one of said first and second signals results in a decrease in level of said selected at least one frequency band in the other of said first and second signals, and said increase in level and said resultant decrease in level are performed independently of changes to other frequency bands in said first and second signal processors, wherein a magnitude of said increase in level is equal to a magnitude of said decrease in level, and;
• wherein means are provided for separately adjusting the level of the first and second signals prior to providing said first and second signals to said signal processors.