Mixer apparatus
AssigneeDalserf Consulting Limited
InventorBarry Hochfield
Life of this patent
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Abstract
The present invention relates to a mixer apparatus (30) for mixing audio signals from a musical instrument (10). The mixer apparatus (30) comprises plural input circuits (34) and an audio signal mixer (36). Each of the plural input circuits (34) has an audio signal input which, in use, is coupled electrically with and thereby receives an audio signal from a different one of plural musical instrument pickups (32) comprised in the musical instrument. The audio signal mixer (36) receives audio signals from the plural input circuits (34) and mixes the received audio signals with one another. Each of the plural input circuits (34) comprises a linear active circuit in an audio signal path between the audio signal input and the audio signal mixer (36).
Claims16
A mixer apparatus for mixing audio signals from a musical instrument, comprising:
- plural input circuits, each of the plural input circuits having an audio signal input which, in use, is coupled electrically with and thereby receives an audio signal from a different one of plural musical instrument pickups for the musical instrument;
- and
- an audio signal mixer receiving audio signals from the plural input circuits and mixing the received audio signals with one another,
- wherein each of the plural input circuits comprises a linear active circuit in an audio signal path between the audio signal input and the audio signal mixer,
- wherein each of the plural input circuits comprises a first input circuit amplifier operative as a buffer amplifier to present a high impedance to the different one of the plural musical instrument pickups, the first input circuit amplifier comprising the linear active circuit,
- wherein each of the plural input circuits further comprises a second input circuit amplifier which receives an audio signal from the audio signal input and provides a second audio signal output which is the other of inverted and not inverted when the first input circuit amplifier provides a first audio signal output which is one of inverted and not inverted, and
- wherein each of the plural input circuits further comprises a phase mixer circuit which receives the first and second audio signal outputs and provides a phase mixer circuit output signal which is a combination of the first and second audio signal output signals, the audio signal mixer receiving the phase mixer circuit output signal from each of the plural input circuits and mixing the plural received phase mixer circuit output signals with one another.
A method of mixing audio signals from a musical instrument, the method comprising:
- receiving in each of plural input circuits an audio signal at an audio signal input of the input circuit from a different one of plural musical instrument pickups for the musical instrument;
- receiving audio signals from the plural input circuits in an audio signal mixer;
- and
- mixing the received audio signals with one another in the audio signal mixer,
- wherein each of the plural input circuits comprises a linear active circuit in an audio signal path between the audio signal input and the audio signal mixer,
- wherein each of the plural input circuits comprises a first input circuit amplifier operative as a buffer amplifier to present a high impedance to the different one of the plural musical instrument pickups, the first input circuit amplifier comprising the linear active circuit,
- wherein each of the plural input circuits further comprises a second input circuit amplifier which receives an audio signal from the audio signal input and provides a second audio signal output which is the other of inverted and not inverted when the first input circuit amplifier provides a first audio signal output which is one of inverted and not inverted, and
- wherein each of the plural input circuits further comprises a phase mixer circuit which receives the first and second audio signal outputs and provides a phase mixer circuit output signal which is a combination of the first and second audio signal output signals, the audio signal mixer receiving the phase mixer circuit output signal from each of the plural input circuits and mixing the plural received phase mixer circuit output signals with one another.
Dependencies are inferred from the claim text.