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Analog Sound--Frequency and Amplitude > Analog Sound--Frequency and Amplitude - Pg. 12

Figure 1.16 A waveform with a high frequency. But sounds in the real world are most often not simple waveforms. They are typically much more complex, as there are numerous frequencies and amplitudes occurring simultaneously in just about any sound. With that in mind, look at Figure 1.17 to see a complex waveform. This figure is from a program for the PC called WaveLab. Space--The Final Dimension In addition to frequency and amplitude, the third and final dimension that defines sound is space. It can be thought of as a counterpart to amplitude, as it is space that defines the amplitude of a recorded sound through time. For example, let's say you are recording your hand clapping in a medium-sized room with the microphone placed in close proximity to your hands. The recorded sound will be very loud and present, as there is very little space between your hands and the microphone. Next, try recording your hand clapping again in the same room, but standing much farther from the microphone. The recorded sound will be much different from before, not only in amplitude, but also in character. For certain instruments, a little space is needed in order to accurately capture its entire frequency range. A good example of this is a recording of an orchestral ensemble within a large auditorium, where the microphones are typically placed a good distance from the instruments. For other instruments, such as drums or acoustic guitars, very little or no space is ideal for accurately capturing its frequency range. However, a commonly used technique for adding