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Musical instrument performance analysis and evaluation method

An analysis method and technology of musical instruments, applied in the field of performance skills learning, can solve the problems of difficult quantification of performance skills, poor effect, inability to achieve real-time processing, etc., and achieve the effect of wide applicability and manpower saving.

Active Publication Date: 2017-03-08
YANGTZE UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent document CN101777341A discloses a music performance practice device and method for performing music performance practice on a musical instrument, which also requires a special electronic input device, which cannot be used in the performance practice of ordinary non-electronic musical instruments
[0006] There are some methods of processing and analyzing the recorded audio that have been played on the Internet, but this method cannot achieve real-time processing and cannot provide real-time guidance to learners, and the effect is poor
[0007] Existing performance techniques are difficult to quantify, making it difficult for users to correct performance skills in a timely manner

Method used

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  • Musical instrument performance analysis and evaluation method
  • Musical instrument performance analysis and evaluation method
  • Musical instrument performance analysis and evaluation method

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Such as figure 1 , 3 Among them, a musical instrument performance analysis method includes the following steps:

[0058] 1. Audio collection; in this example, smart devices with an operating system of Android or iPhone, such as mobile phones and tablets, are used as hardware to collect audio recordings. The sampling rate of sound by hardware devices is different for different hardware, but each device has its own fixed value: fs (sampling rate), unit Hz (hertz). The hardware device has a minimum sampling time in the sampling process: t unit: s (seconds), that is, the hardware device samples once every t seconds, from which the number of samples obtained by one sampling can be calculated.

[0059]2. Add a Hanning window to the collected sampling samples; preferably, in this example, h(n)=0.5-0.5×cos(2πn / (N-1)) (0≤n<N-1) or h (n)=0 (other) where n is a single sample and N is the window size.

[0060] 3. Use the FFTW transformation library to perform FFT transformation...

Embodiment 2

[0073] On the basis of Example 1, such as figure 1 , 3 , 4, a method for evaluating using the above-mentioned musical instrument performance analysis method, comprising the following steps:

[0074] 1. Obtain a standard audio format; preferably, convert an audio file that is not in the wav format into the wav format.

[0075] 2. Obtain the standard staff according to the standard audio format;

[0076] preferred as image 3 , get the bit rate Rb from the file, unit: bps;

[0077] The sampling rate fs can be calculated from the bit rate Rb;

[0078] According to the sampling rate, read the byte stream of the audio file at the same time as playing the staff to obtain sampling samples;

[0079] Add a Hanning window to the collected sampling samples;

[0080] Use the FFTW transform library to perform real-to-real FFT transform on the windowed samples to obtain the double array M, the length of the M array is L; then the frequency of f (Hz) corresponding to the array M can be...

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Abstract

The invention provides a musical instrument performance analysis method. The method comprises steps: audio acquisition is carried out; Hanning window applying is carried out on an acquired sample; an FFTW transform library is used for acquiring a frequency domain spectrogram; frequencies with a small height are neglected during the frequency domain spectrogram processing process for noise reduction, positions with wave crest features are processed, and the frequency at the point is obtained and recorded; all wave crest features are processed, and a corresponding frequency list is obtained; and according to a standard frequency check list of a key, a performance staff is obtained. The evaluation method comprises steps: a standard audio format is acquired; a standard staff is obtained according to the standard audio format; and the performance staff and the standard staff are compared to evaluate the performance of the user. Through adopting the above method, real-time guidance and feedback can be carried out, the user can be more effectively guided to learn by himself or herself, and self learning in an environment without guidance by the teacher can be completed.

Description

technical field [0001] The invention relates to the field of performance skill learning, in particular to a musical instrument performance analysis and evaluation method, which is suitable for percussion musical instruments, such as pianos and electronic pianos among keyboard instruments, and drum sets and gongs among percussion instruments. Background technique [0002] In the current learning of musical instruments, such as the piano, to evaluate whether there is a problem with a student's piano performance, the method of listening and guiding by a professional teacher is generally adopted, and this method requires one-on-one tutoring by the teacher, which is inefficient. It consumes a lot of manpower and time resources, and the labor cost is relatively high. [0003] There are some teaching applications for electronic pianos in the application market, and the scope of use of such applications is only for electronic pianos. Various problems that occur when the piano is pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B15/00G06F17/30
CPCG06F16/683G09B15/00G10H2210/091
Inventor 向华王琮
Owner YANGTZE UNIVERSITY
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