Please select the most similar patent number from A, B, C and D. Which number is?
A tone generation method for Pythagorean tuning, relating to the field of the modern music industry. An input module (1) is used to input a starting tone frequency, the number of descending tones and the number of ascending tones. Then, corresponding tone values are calculated by means of a processing and calculation module (2), and are then outputted by means of an output module (3). A sound output unit in the output module (3) uses various musical instruments to play an obtained tone sequence, thereby facilitating use by music practitioners.
A: A simulation device for a bowed string instrument, the simulation device for a bowed string instrument comprising a string (11); a conversion module (21), which is connected to the string and which is used for converting mechanical vibrations of the string (11) into a sound signal; a sound emitting device (31), which is connected to the conversion module (21) and which is used for receiving the sound signal and emitting the sound of a bowed string instrument corresponding to the sound signal. The simulation device for a bowed string instrument converts mechanical vibrations of the string (11) into a sound signal by means of the conversion module (21), receives the sound signal by means of the sound emitting device (31) and emits the corresponding sound of a bowed string instrument; since only a low-cost string is required to produce mechanical vibrations and since the corresponding sound of a bowed string instrument may be obtained by means of the mechanical vibrations, the present invention avoids the problem wherein a high-cost string is required in traditional bowed string instruments in order to produce high sound quality, and thus the same sound quality as a traditional bowed string instrument maybe obtained at a lower price.
B: A musical instrument DIY component, comprising a fixing component (1), a cavity component (2), an intracavity component (3) and a string handle component (4), and also comprising several strings. The cavity component (2) comprises a wooden panel (21), a base plate (22) and a side plate component (23). The intracavity component (3) comprises a wooden jacking force block (31), a bottom force block (32) and a surrounding edge component (33). A musical instrument DIY component and a corresponding assembling method for the musical instrument DIY component can assemble a new musical instrument having functions of a toy musical instrument and a playing musical instrument, which can achieve a melody effect of a conventional playing musical instrument when used as the playing musical instrument, are particularly suitable for rudimentary teaching in the playing of the musical instrument, help a beginner get familiar with the structure of the musical instrument in the assembly process, and greatly improve and develop the beginner&#39;s interest in learning.
C: A voice interactive recognition control system, comprising an audio signal acquisition module (1), an emotion recognition and determination module (2), a voice intelligent generation module (3), a voice output module (4), a control module (5) and a wireless transceiving module (6) connected to one another. The audio signal acquisition module (1) is used for acquiring and filtering external input voice information; the emotion recognition and determination module (2) is used for performing emotion recognition according to the external input voice information and determining a grammatical sense and an emotion category of the input voice; the voice intelligent generation module (3) is used for generating corresponding response voice information according to the grammatical sense and the emotion category of the input voice and sending the response voice information to the voice output module (4) or the control module (5); and the control module (5) is used for sending a control instruction to a corresponding intelligent device according to the received response voice information. Humanized control to the intelligent device is achieved by means of voice interaction.
D: A voice evaluation method for evaluating language pronunciation of a user in a language learning process, comprises the following steps: step S101, acquiring a voice input of a user through a voice recording device of a voice evaluation apparatus; step S102, dividing basic voice units of the recorded voice to obtain a sequence of voice units of the recorded voice; step S103, extracting a characteristic of the sequence of voice units, and acquiring temperament characteristics of the sequence of voice units; step S104, respectively comparing the extracted temperament characteristics with a teaching example voice and a standard voice predicted by a voice prediction model to make an analysis; and step S105, marking a voice comparison result on a voice text of the user.
Answer: A