[music-dsp] Logarithm

[Jon Watte]

> We often say logarithmic but never specify any basis.

That's because they're all the same, only with a linear scaler
differentiating them. If you can calculate, say, log2( n ), then calculating
logX( n ) for a fixed X is only one multiply more expensive.

If it's a log scale, then every power-of-two mark will be equally distant
from its predecessor. Every power-of-ten mark will ALSO be equally distant
from its predecessor.

Cheers,

				/ h+


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