37. Editing anti-Harmonics

editing anti-Harmonic: Index graph tab

Figure 37.1
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editing anti-Harmonic: Anti-harmonic tab

Figure 37.2
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Figures 37.1 and 37.2 show an anti-Harmonic called dog being edited. Despite its name, dog actually sounds more like a drum than a dog.

As you can see, it is linked to an anti-Harmonic Base, also called dog, that defines what the distribution of frequencies is for this anti-Harmonic. The number of frequencies in the anti-Harmonic Base is shown in the read-only field No. of anti-harmonic base indexes in order to help synchronise the number of factors in this anti-Harmonic with the number in its anti-Harmonic Base. It is possible for different anti-Harmonic records to reference the same anti-Harmonic Base.

In figure 37.1 the Index graph tab is shown, which is a simple graphical display of the factors in the table.

In figure 37.2 the Anti-harmonic tab is shown, whose data references the anti-Harmonic Base dog to determine which frequencies the factors of this anti-Harmonic apply to; or, to be more precise, which frequency multiples of the fundamental or lowest frequency — the actual frequencies are determined by context, starting with the Start pitch of the Sequence box that contains this anti-Harmonic. Observe that the highest frequency multiple is close to 1024 (the highest x-axis label), so if the lowest pitch set by context were MIDI pitch 60 (Middle 'C'), which has a frequency of 261.6255653006Hz, the highest frequency would be 1024 times that (around 267kHz). As this is above the range of human hearing (about 20kHz), a more suitable start pitch, perhaps, would be MIDI note 7 (which has a frequency of 12.2498573744Hz), resulting in a highest frequency of 12,543Hz, which roughly corresponds to MIDI note 127.