# US 2021/0243543 A1 · Management Server, Audio Testing Method, Audio Client System, and Audio Testing System > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243543 A1 - Document ID: US20210243543A1 - Status: Published application - Kind: A1 - Application number: 17/162,672 - Filed: 2021-01-29 - Published: 2021-08-05 - Earliest claimed: 2020-01-31 - Assignees: Yamaha Corporation - Applicants: Yamaha Corporation - Inventors: Daisuke TAKAHASHI - Web page: https://patentgrep.com/patent/US20210243543A1 ## CPC - G06F 3/165: {Management of the audio stream, e.g. setting of volume, audio stream path} - H04R 29/001: {for loudspeakers (H04R29/007 takes precedence)} - G05B 15/02: electric - G06F 13/4027: {using bus bridges (G06F13/4022 takes precedence)} - G10L 25/51: for comparison or discrimination - H04R 3/00: Circuits for transducers (arrangements for producing a reverberation or echo sound G10K15/08; amplifiers H03F) - H04R 27/00: Public address systems (circuits for preventing acoustic reaction H04R3/02; circuits for distributing signals to loudspeakers H04R3/12; {monitoring or testing arrangements for public address systems H04R29/007}; amplifiers H03F) - H04R 2227/003: Digital PA systems using, e.g. LAN or internet - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - G10L: SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING ## Abstract A management server includes a memory, and at least one processor configured to control an audio client system, by execution of instructions stored in the memory. The at least one processor is configured to acquire a first transfer function measured for a portion of or for all of the first signal path in the audio client system. The at least one processor is also configured to generate a virtual second signal path for a portion of or for all of the first signal path in the audio client system, and calculate a second transfer function for a portion of or for all of the generated virtual second signal path. The at least one processor is also configured to determine a condition of the audio client system, based on a result of a comparison between the first transfer function and the second transfer function. ## Claims ### Claim 1 A management server comprising: a memory; and at least one processor configured to control an audio client system, by execution of instructions stored in the memory, wherein the audio client system includes: a speaker; an input end configured to receive a supply of an audio signal; and a first signal path from the input end to the speaker, wherein the at least one processor is configured to: acquire a first transfer function measured for a portion of or for all of the first signal path in the audio client system; generate a virtual second signal path for a portion of or for all of the first signal path in the audio client system, and calculate a second transfer function for a portion of or for all of the generated virtual second signal path; and determine a condition of the audio client system, based on a result of a comparison between the first transfer function and the second transfer function. ### Claim 2 (depends on 1) The management server according to claim 1, wherein the at least one processor is configured to correct the generated virtual second signal path, based on the result of the comparison. ### Claim 3 (depends on 1) The management server according to claim 1, wherein the first signal path in the audio client system includes at least one of: a signal path within an audio input/output apparatus; a signal path within a mixer; a signal path within an audio processor; and a signal path within an amplifier. ### Claim 4 (depends on 1) The management server according to claim 1, wherein the at least one processor is configured to initiate each of the acquisition of the first transfer function, the generation of the first transfer function and the determination of the condition of the audio client system, in response to a remote instruction given at a terminal apparatus. ### Claim 5 (depends on 4) The management server according to claim 4, wherein the at least one processor is configured to transmit a result of the determination to the terminal apparatus. ### Claim 6 An audio testing method, implemented by a processor, comprising: preparing an audio client system, wherein the audio client system includes: a speaker; an input end configured to receive a supply of an audio signal; and a first signal path from the input end to the speaker, acquiring a first transfer function measured for a portion of or for all of the first signal path in the audio client system; generating a virtual second signal path for a portion of or for all of the first signal path in the audio client system; calculating a second transfer function for a portion of or for all of the generated virtual second signal path; and determining a condition of the audio client system on a basis of a result of a comparison between the first transfer function and the second transfer function. ### Claim 7 An audio client system comprising: a speaker; an input end configured to receive a supply of an audio signal; a first signal path from the input end to the speaker; a memory; and at least one processor, which upon execution of instructions stored in the memory, is configured to: measure a first transfer function for a portion or for all of the first signal path; and transmit the measured first transfer function to a management server, wherein the first transfer function is used for determining, by the management sever, a condition of the audio client system. ### Claim 8 An audio testing system comprising: an audio client system; and a management server configured to control the audio client system, wherein the audio client system includes: a speaker; an input end configured to receive a supply of an audio signal; a first signal path from the input end to the speaker; a first memory; and at least one first processor, which upon execution of instructions stored in the first memory, is configured to: measure a first transfer function for a portion of or for all of the first signal path; and transmit the first transfer function to the management server, wherein the management server includes: a second memory, and at least one second processor, which upon execution of instructions stored in the second memory, is configured to: acquire the first transfer function transmitted from the audio client system, generate a virtual second signal path for a portion of or all of the first signal path in the audio client system, calculate a second transfer function for a portion of or all of the generated virtual second signal path; and determine a condition of the audio client system, based on a result of a comparison between the first transfer function and the second transfer function. ### Claim 9 (depends on 8) The audio testing system according to claim 8, wherein: a condition of the first signal path in the audio client system is defined based on restore data, the at least one second processor of the management server is configured to generate the virtual second signal path, based on the restore data, and the at least one first processor of the audio client system is configured to measure the first transfer function for the first signal path defined based on the restore data. ### Claim 10 (depends on 8) The audio testing system according to claim 8, further comprising: a relay processing apparatus configured to connect the audio client system and the management server, wherein the relay processing apparatus is configured to transmit the first transfer function to the management server, instead of the audio client system.