Notes on a musical instrument) into the microphone and lookingĪt their spectra. If you change the loudness, the size (orĪmplitude) of the spectral components gets bigger. If you change a sound without changing its loudness or its If youĬhange the pitch, the frequency of all of the components increases. That determines the timbre is the relative size of the different Have the same pitch and the same loudness.) One of the things Qualities that are different in two different sounds which (Timbre has a negative definition - it is the sum of all the Pitch then you are, by definition, changing its timbre. In this figure, the two upper figures are spectra, taken Pitch and loudness, you will notice that there is a big differenceĬrescendo played on a trombone. On the vertical axis, and sound level (on a decibel scale) Spectrogram (lower figure) shows time on the x axis, frequency Over the first and last 0.3 seconds of the sound file. Observe the harmonics, which appear as equally spaced components In false colour (blue is weak, red is strong). In this example, the pitch doesn't change, so In the spectrogram, the harmonics appearĪs horizontal lines. The frequencies of the spectral lines are constant. The higher harmonics increase more than do The power of every harmonic increases with time, so the soundīecomes louder. Mestrenova stacked spectra colors series#.Mestrenova stacked spectra colors software#.
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