
LOG (AUDIO, FLOAT)
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Computes the logarithm of input, either base-2, base-e or base-10 depending on the Base pin setting (unexposed).
For other bases, just use the base-2 logarithm with the formula  log_b(x) = log_2(x)/log_2(b)

NOTE: to avoid NANs, a negative input will still produce -oo

AUDIO VERSION: Accuracy vs CPU load can be chosen by the (unexposed) Accuracy pin