Automatic adjustment system and automatic adjustment method for audio devices

An automatic adjustment system for an audio device comprising:

• an audio analyzer;
• a digital signal processor connected to are output of said audio device;
• a multi-channel amplifier having channels, each having a respected gain;
• a time-alignment device for correcting a phase relationship between said respective signals;
• means for entering and storing a goal profile defining a desired frequency response of said audio device;
• means for storing equalizer data;
• a parametric equalizer of said digital signal processor having means for altering said frequency response of said audio device responsively to said equalizer data;
• said audio analyzer having a means for generating a reference signal and transmitting said reference signal to said audio device;
• said audio analyzer having means for measuring said frequency response;
• and
• said audio analyzer having means for changing said equalizer data responsively to said goal profile and said measuring.

An automatic adjustment system for audio devices comprising:

• an audio device having at least two amplifiers;
• each of said at least two amplifiers having a gain;
• automatic adjustment means connectable to said audio device;
• means for controlling each of said gains of said at least two amplifiers responsively to commands from said automatic adjustment means;
• said automatic adjustment means including:
• a microprocessor;
• a transmission unit for receiving control signals from an audio signal analyzer;
• each of said at least two amplifiers having an input;
• a signal applied to each of said inputs;
• an input control unit for attenuating said signal applied to said input;
• each of said input control units having an output;
• each of said amplifiers having a power amplifier;
• and
• said output of said each of said input control units being applied to said power amplifier.

A system for analyzing an output of an audio device, comprising:

• means for storing equalizer data;
• equalizer means for dividing said output into a plurality of frequency subbands;
• means for detecting a frequency response of said output;
• said equalizer means including means for selectively amplifying each of said frequency subbands in response to an output of said means for detecting a frequency response and said equalizer data;
• at least first and second channels of said audio device;
• each of said subbands together with at least another of said subbands forming one of a plurality of bands, each consisting of a contiguous range of frequencies defined by a lower cutoff frequency and an upper cutoff frequency;
• means for selectively directing each of said bands to a corresponding one of said channels;
• means for generating a real-time histogram-type display of said frequency response;
• and
• means for graphically displaying said lower cutoff frequency and said upper cutoff frequency at each of said bands with said histogram-type display.

A gain adjustment system for channels of a multichannel amplifier of an audio system, comprising:

• each of said channels having an adjustable gain;
• a parametric equalizer for modifying an output of said audio device and outputting separate signals;
• each of said signals being directed to a corresponding one of said channels;
• each of said channels having means for driving a respective speaker;
• said parametric equalizer having an input;
• analyzer means, connectable to said parametric equalizer, for generating a reference signal and applying said reference signal to said input of said parametric equalizer;
• and
• said analyzer means including means for detecting a sound intensity level generated by an output of each of said respective speakers and indicating a result of said detecting for bearing said adjustable gain.

An automatic adjustment system for audio devices comprising:

• a memory for storing equalizer data;
• an audio device having programmable equalizer means for selectively modifying an audio output thereof according to said equalizer data;
• an audio signal analyzer having means for generating a reference signal;
• said audio signal analyzer being connectable to at least one of said programmable equalizer means and said audio device;
• said audio device including means for generating an audible output responsively to said reference signal;
• means for storing a current goal profile;
• said audio signal analyzer including means for comparing said audible output with said current goal profile;
• means for automatically adjusting said equalizer data responsively to a result of said comparing;
• means for entering a proposed goal profile;
• said means for entering including means for comparing said proposed goal profile with said current goal profile stored in said means for storing and one of confirming and rejecting said proposed goal profile responsively to a result of said comparing.

An automatic adjustment system for audio devices comprising:

• a memory for storing programmable gain data and equalizer data;
• an audio device having programmable equalizer means for selectively modifying an audio output thereof according to said equalizer data;
• said audio device having programmable amplifier means for amplifying said audio output according to said programmable gain data;
• audio analyzer means, connectable to said audio device, having means for overwriting said programmable gain data and said equalizer data with adjusted programmable gain data and adjusted equalizer data, respectively;
• said audio signal analyzer having means for generating a reference signal;
• said audio device including means for generating an audible output responsively to said reference signal;
• said audio signal analyzer having means for storing goal data indicating a desired result of said amplifying and said modifying;
• means for comparing said goal data with said audible output;
• and
• said audio analyzer including means for permanently storing said goal data, said adjusted gain data and said equalizer data.

A device for automatically adjusting an audio system, comprising:

• an audio device having an output;
• a signal processor;
• means for applying said output to said signal processor;
• means for storing equalizer data;
• said signal processor including means for altering a frequency response of said output, responsively to said equalizer data, to generate a corrected output;
• an audio analyzer;
• means for connecting said audio analyzer to said signal processor;
• means for entering a goal curve in said audio analyzer;
• said goal profile indicating a desired result of said altering when a reference signal is applied to said signal processor;
• said audio analyzer including means for storing said goal profile in said means for storing;
• said audio analyzer including means for generating said reference signal and applying said reference signal to said signal processor;
• said audio analyzer including means for measuring said frequency response;
• said audio analyzer including means for adjusting said equalizer data responsively to said measuring and said goal data;
• said audio analyzer including means for saving said goal profile and said equalizer data on a nonvolatile memory;
• said audio analyzer including means for printing out said goal profile;
• and
• means for restoring said goal profile data and said equalizer data from said means for saving to said signal processor.