22 Sep
2008
22 Sep
'08
8:51 p.m.
Back on Monday 22 September 2008, Fons Adriaensen was like:
On Fri, Sep 12, 2008 at 06:17:38PM -0500, Reuben
Martin wrote:
I have an Aphex 104 myself, and have been curious in how it works. My hack
using the simple harmonics generator sounds nowhere near as smooth. It
generally does "ok" for live recorded audio, but it doesn't sound very
smooth
on snyth generated sources. And it is nowhere near what I get with the Aphex
unit.
I find it odd that the harmonics levels stay at the same level reguardless of
the input level. Very interesting.
-Reuben
If you are truly that into the math side of it,
the source for those
plugins is always available for you to pull apart and see for yourself
the innerworkings and algorithms used.
I did some measurements on a real (hardware) Aural Exciter.
Whatever it does is *very* different from what the harmonic
generator plugin is doing.
- Almost all harmonics up to at least the 15th are present.
The first few (2,3,4) have almost the same level, above
that levels go down gradually, with a clear dip at the
seventh.
- The relative (to the fundamental) level of the harmonics
stays more or less the same for a wide range of input
levels. This is very different from any simple form of
harmonic generator, where the level of the Nth harmonic
would be roughly proportional to the Nth power of the
input level.