But the viewable angle of yaw axis should be constant if we want to see the whole piano when the window is reshaped.
The gluPerspective function has a parameter fovy, which means the viewable angle of pitch axis is constant. (a) The initial shape of window, (b) The squashed window, (c) The narrow window. To avoid the stretching or squashing of the screen when the window is resized, I call the viewport and perspective function in the reshape callback function.įigure 3. This project uses the perspective projection. To facilitate the interaction of different objects, most of the time I'm using the floor coordinate.
Figure 2 shows the hierarchical tree of the objects. In order to draw each object in a hierarchical way and to perform the coordinate system transformation in a reasonable way, I use the hierarchical modeling method. hierarchical modelling, viewing and projection, lighting and materials, and texture.įigure 2 The hierarchical tree of this project This assignment uses a range of the various graphics techniques learned in this module, e.g. I need to copy the next specified number of frames (typically 480) to the specified address in the callback function. The library will call the callback function when the next piece of audio is needed. It is quite small and in single header file. To be able to play music in sync, I use the Miniaudio library to operate the audio device. When rendering the heights of piano keys and the raw FFT results, a Time-Smoothed technique is applied to the heights, to reduce the intense jumping of the piano keys: (a) The Fourier Transform, (b) The purposed triangle filters. Figure 1(b) shows the purposed triangle filters.įigure 1.
In this formula, $w$ is the result of FFT, and $k_0, k_L, k_H$ are the frequency of the current musical note, lower note, higher note respectively in the transformed frequency axis. Then the Fast Fourier Transform (FFT), shown in Figure 1(a), is applied to this piece of Hanning weighted data:Īfter that, for each piano key, I purposed a set of triangle filters, which is similar to Mel spectrum to get the height of the piano key from the result of the Fourier Transform: The Hanning window function is multiplied to the corresponding samples: First, I crop a piece of music which has 2048 samples. In simple terms, it is to get the intensity of each musical note (do, re, mi…) at the current time. I will briefly introduce this part.Īudio transcription is the practice of notating a piece or a sound in wave format. Because human is very sensitive to continuous audio signals, there are quite a few details to consider in terms of audio-video synchronization and waveform generation. Audio Signal ProcessingĪudio signal processing is a crucial part of this assignment. The project also contains some interesting interactions between the user and snowball, the user and piano keys, and between the snowball and piano keys. The purposed music visualizer uses Fourier Transform to get the volume on different frequencies, and then uses a range of graphics techniques, such as hierarchical modelling, viewing and projection, lighting and materials, and texture mapping to render the 3D scene, piano keys, snow balls and other objects while the music is playing. This report purposes a quite beautiful music visualizer as the assignment of CPT205 module. The music visualization is typically a feature in the media player software, which can generate the animation from pieces of music and render in real time with the music as it is playing. Clicking on the piano keys with the mouse.
#MUSIC VISUALIZER PROGRAM FREE DOWNLOAD#
Just download in the "Release" area and no need to install. This is a coursework project of CPT205 Computer Graphics Assignment2: 3D Modeling Project, Xi'an Jiaotong-Liverpool University.
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