# US 2014/0190336 A1 · Musical sound control device, musical sound control method, and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190336 A1 - Document ID: US20140190336A1 - Status: Published application - Kind: A1 - Application number: 14/145,283 - Filed: 2013-12-31 - Published: 2014-07-10 - Earliest claimed: 2013-01-08 - Assignees: Casio Computer Co., Ltd. - Applicants: Casio Computer Co., Ltd. - Inventors: Tatsuya DEJIMA - Web page: https://patentgrep.com/patent/US20140190336A1 ## CPC - G10H 3/188: {for converting the signal to digital format (transmission using a MIDI interface G10H1/0066)} - G10H 1/0551: {using variable capacitors} - G10H 3/125: {Extracting or recognising the pitch or fundamental frequency of the picked up signal} - G10H 2220/301: Fret-like switch array arrangements for guitar necks - G10H 2250/235: Fourier transform; Discrete Fourier Transform [DFT]; Fast Fourier Transform [FFT] - G10H: ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE ## Abstract A CPU 41 acquires a string vibration signal in a case where a string picking operation is performed with respect to the stretched string 22, analyzes a frequency characteristic of the acquired string vibration signal, determines whether or not the analyzed frequency characteristic satisfies a predetermined condition, and changes a frequency characteristic of a musical sound generated in the connected sound source 45 depending on a case where it is determined that the predetermined condition is satisfied or determined that the predetermined condition is not satisfied. ## Claims ### Claim 1 A musical sound control device, comprising: an acquisition unit that acquires a string vibration signal in a case where a string picking operation is performed with respect to a stretched string; an analysis unit that analyzes a frequency characteristic of the string vibration signal acquired by the acquisition unit; a determination unit that determines whether or not the analyzed frequency characteristic satisfies a condition; and a change unit that changes a frequency characteristic of a musical sound generated in a sound source according to a determination result by the determination unit. ### Claim 2 (depends on 1) The musical sound control device according to claim 1, wherein the change unit makes a change, in a case where it is determined that the predetermined condition is satisfied, into a musical sound having a frequency characteristic with a less high frequency component compared to a case where it is determined that the predetermined condition is not satisfied. ### Claim 3 (depends on 1) The musical sound control device according to claim 1, wherein the determination unit determines that the predetermined condition is satisfied in a case where there is correlation at a certain level or above between at least one frequency characteristic model prepared beforehand and the frequency characteristic analyzed by the analysis unit. ### Claim 4 (depends on 1) The musical sound control device according to claim 1, wherein the analysis unit extracts a frequency component in a predesignated part of the acquired string vibration signal, and the determination unit determines that the predetermined condition is satisfied in a case where the extracted frequency component includes a specific frequency component. ### Claim 5 (depends on 4) The musical sound control device according to claim 4, wherein the analysis unit extracts a frequency component in an interval from a vibration start time of the acquired string vibration signal to before a predetermined time. ### Claim 6 (depends on 4) The musical sound control device according to claim 4, wherein the analysis unit extracts a frequency component in an interval from a vibration end time of the acquired string vibration signal to an elapsed predetermined time. ### Claim 7 A musical sound control method, comprising: acquiring a string vibration signal in a case where a string picking operation is performed with respect to a stretched string; analyzing a frequency characteristic of the acquired string vibration signal; determining whether or not the analyzed frequency characteristic satisfies a condition; and changing a frequency characteristic of a musical sound generated in a sound source depending on a case where it is determined that the predetermined condition is satisfied or determined that the predetermined condition is not satisfied. ### Claim 8 (depends on 7) The musical sound control method according to claim 7, wherein a change is made, in a case where it is determined that the predetermined condition is satisfied, into a musical sound having a frequency characteristic with a less high frequency component compared to a case where it is determined that the predetermined condition is not satisfied. ### Claim 9 (depends on 7) The musical sound control method according to claim 7, wherein it is determined that the predetermined condition is satisfied in a case where there is correlation at a certain level or above between at least one frequency characteristic model prepared beforehand and the analyzed frequency characteristic. ### Claim 10 (depends on 7) The musical sound control method according to claim 7, wherein a frequency component in a predesignated part of the acquired string vibration signal is extracted to determine that the predetermined condition is satisfied in a case where the extracted frequency component includes a specific frequency component. ### Claim 11 (depends on 10) The musical sound control method according to claim 10, wherein a frequency component is extracted in an interval from a vibration start time of the acquired string vibration signal to before a predetermined time. ### Claim 12 (depends on 10) The musical sound control method according to claim 10, wherein a frequency component is extracted in an interval from a vibration end time of the acquired string vibration signal to an elapsed predetermined time. ### Claim 13 A non-transitory storage medium storing a program configured to cause a computer to execute: an acquisition step of acquiring a string vibration signal in a case where a string picking operation is performed with respect to a stretched string; an analysis step of analyzing a frequency characteristic of the acquired string vibration signal; a determination step of determining whether or not the analyzed frequency characteristic satisfies a condition; and a change step of changing a frequency characteristic of a musical sound generated in a sound source depending on a result of the determination. ### Claim 14 (depends on 13) The non-transitory storage medium according to claim 13, wherein in the change step, a change is made, in a case where it is determined that the predetermined condition is satisfied, into a musical sound having a frequency characteristic with a less high frequency component compared to a case where it is determined that the predetermined condition is not satisfied. ### Claim 15 (depends on 13) The non-transitory storage medium according to claim 13, wherein in the determination step, it is determined that the predetermined condition is satisfied in a case where there is correlation at a certain level or above between at least one frequency characteristic model prepared beforehand and the frequency characteristic analyzed in the analysis step. ### Claim 16 (depends on 13) The non-transitory storage medium according to claim 13, wherein in the analysis step, a frequency component in a predesignated part of the acquired string vibration signal is extracted, and in the determination step, it is determined that the predetermined condition is satisfied in a case where the extracted frequency component includes a specific frequency component. ### Claim 17 (depends on 16) The non-transitory storage medium according to claim 16, wherein in the analysis step, a frequency component is extracted in an interval from a vibration start time of the acquired string vibration signal to before a predetermined time. ### Claim 18 (depends on 16) The non-transitory storage medium according to claim 16, wherein in the analysis step, a frequency component is extracted in an interval from a vibration end time of the acquired string vibration signal to an elapsed predetermined time.