SDIF descriptor scaling identifiers
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To be stored in the ScaleID columns of the descriptor information matrices.

The left digit identifies the amplitude and the right digit the frequency.
0 means not used, 1 means linear, 2 means logarithmic and 3 means powered.


01  Linear frequency
02  Log. frequency
10  Linear amplitude
20  Log. amplitude
30  Power amplitude
11  Linear amplitude/Linear frequency
12  Linear amplitude/Log. frequency
21  Log. amplitude/Linear frequency
22  Log. amplitude/Log. frequency
31  Power amplitude/Linear frequency
32  Power amplitude/Log. frequency