# US 2021/0241740 A1 · Arbitrary signal insertion method and arbitrary signal insertion system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0241740 A1 - Document ID: US20210241740A1 - Status: Published application - Kind: A1 - Application number: 17/049,701 - Filed: 2019-03-26 - Published: 2021-08-05 - Earliest claimed: 2018-04-24 - Assignees: Masuo Karasawa - Inventors: Masuo Karasawa; Kotaro Kashiwa - Web page: https://patentgrep.com/patent/US20210241740A1 ## CPC - G10H 1/40: Rhythm - G10H 1/0066: {using a MIDI interface} - G10L 19/018: Audio watermarking, i.e. embedding inaudible data in the audio signal - G10H 2210/071: for rhythm pattern analysis or rhythm style recognition - G10H 2240/091: Info, i.e. juxtaposition of unrelated auxiliary information or commercial messages with or between music files - G10H 2240/325: Synchronizing two or more audio tracks or files according to musical features or musical timings - 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 - G10L: SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING ## Abstract An arbitrary signal insertion method and an arbitrary signal insertion system, capable of inserting a transmittable arbitrary signal (insertion information M) at a predetermined insertion timing into an acoustic sound played in real time. An insertion timing is previously associated with a predetermined time code with master rhythm information. An acoustic sound into which insertion information will be inserted is music sound generated by a real-time performance unit and is accompanied by a second rhythm. The insertion information is inserted into the music sound generated by the real-time performance unit at the insertion timing after the rhythm of master rhythm information and the rhythm of the music sound generated by the real-time performance unit are synchronized. The synchronization is achieved by a rhythm transmitter which notifies a player of a rhythm session musical instrument of the rhythm of the master rhythm information with sound or light. ## Claims ### Claim 1 An arbitrary signal insertion method for inserting a transmittable arbitrary signal having a predetermined frequency into an acoustic sound at a desired insertion timing, wherein the insertion timing is previously associated with a predetermined time code together with a first rhythm, the acoustic sound is composed of a plurality of sounds with a second rhythm, and the arbitrary signal is inserted into the acoustic sound at the insertion timing after the first rhythm and the second rhythm are synchronized. ### Claim 2 (depends on 1) An arbitrary signal insertion method as claimed in claim 1, wherein the second rhythm is an acoustic rhythm actually played by a player, and synchronization between the first rhythm and the second rhythm is achieved by notifying the player of the rhythm information related to the first rhythm. ### Claim 3 (depends on 1) An arbitrary signal insertion method as claimed in claim 1, wherein: the second rhythm is an acoustic rhythm actually played by a player, and after it is confirmed that the second rhythm is synchronized with the first rhythm, the arbitrary signal is inserted into the acoustic sound at the insertion timing. ### Claim 4 (depends on 3) An arbitrary signal insertion method as claimed in claim 3, wherein: the synchronization is confirmed by comparing the second rhythm included in MIDI data related to the actually played acoustic sound with the first rhythm included in the MIDI data related to musical score information of the prerecorded acoustic sound. ### Claim 5 (depends on 1) An arbitrary signal insertion method as claimed in claim 1, wherein the arbitrary signal inserted into the acoustic sound includes at least insertion information for operating and controlling a peripheral device to perform a predetermined operation. ### Claim 6 (depends on 5) An arbitrary signal insertion method according to claim 5, wherein the peripheral device comprises a plurality of peripheral devices, and the insertion information is configured to command the peripheral devices to perform different operations depending on respective specific information of the peripheral devices. ### Claim 7 An arbitrary signal insertion system for insetting a transmittable arbitrary signal having a predetermined frequency into an acoustic sound at a desired insertion timing, comprising: an arithmetic unit which stores the insertion timing in association with a predetermined time code together with a preset first rhythm; a start command section for commanding the arithmetic unit to start performance; a real-time performance unit for outputting an acoustic sound composed of a second rhythm actually performed by a player; a rhythm transmitter for emitting rhythm information of the acoustic sound to perform to the player of the real-time performance unit; and a peripheral device which receives the arbitrary signal inserted in the acoustic sound output from the real-time performance unit and is operated and controlled by insertion information included in the arbitrary signal, wherein the arithmetic unit outputs the first rhythm to the rhythm transmitter and, at the same time, outputs the arbitrary signal to the real-time performance unit at the insertion timing associated with the first rhythm. ### Claim 8 An arbitrary signal insertion system for inserting a transmittable arbitrary signal having a predetermined frequency into an acoustic sound at a desired insertion timing, comprising: an arithmetic unit which stores the insertion timing in association with a predetermined time code together with a preset first rhythm; a real-time performance unit for outputting an acoustic sound composed of a second rhythm actually performed by a player; and a peripheral device which receives the arbitrary signal inserted in the acoustic sound output from the real-time performance unit and is operated and controlled by insertion information included in the arbitrary signal; wherein the real-time performance unit has means for transmitting second rhythm information generated by actual performance to the arithmetic unit, and the arithmetic unit confirms that the second rhythm input from the real-time performance unit is synchronized with the first rhythm, and then outputs the arbitrary signal to the real-time performance unit at the insertion timing associated with the first rhythm.