Description: This function plots the pitch, time, velocity. It read in a Midi file using nmat format from the MIDI Toolbox. Arrays are created from the velocity, pitch, and onsets/offsets from the midi structure and plotted on a 3-dimensional graph. The highest velocities are shown in the peaks of the graph, lower velocities are shown as smaller lumps. The colors in the graph can be changed using the COLORMAP command. This is controlled by 64 RGB components. The default setting for the colormap used, shows the brightest region at the 40 percent level to more easily observe salient peaks.

Usage format:
pitchvel3d(nmat)

Usage example:
nmat=readmidi('laksin.mid');
pitchvel3d(nmat)

Colormap example:
map=[1/64:1/64:1;.5:0.5/64:.5/64;.5:-.5/64:.5/64]';
colormap(map)

Files:

This is the output image for a sample midi provided by the MIDI Toolbox. Laksin.mid

This is the same output image as above from a bird's eye view.

This image is from the function pianoroll in Midi Toolbox. This was used for comparison.

This image an superimposed image of the above images for closer inspection.