[sdiy] Lin/Log VCAs and envelopes - compensating for log VCAs

[Ingo Debus]

> Am 07.02.2016 um 00:18 schrieb Richie Burnett <rburnett at richieburnett.co.uk>:
> 
> The IIR filter calculation only takes two or three instructions on a DSP but is quite costly on a low-end microcontroller without hardware multiply. 

A micro without hardware multiply? Such a thing still exists these days? Even the venerable 8051 had one.

Ingo