IEF - Understaning the whole modulation

Last edited by Nowhk on Mon Jul 14, 2014 10:38 am, edited 1 time in total.

Tried in these two days with example and documentation, but I can't figure it out how it works. I mean the IEF on Love Philter, for example.

First - In the tutorial it says the IEF returns modulation values so that envelopes above the mid-line of the graph area are positive and envelopes below the mid-line are a negative. (and on the picture in the manual the yellow line is, in fact, only from the mid horizontal line to the ief envelope). But at home I can't reproduce it;

I always get this, from the bottom of the graph to the drawed envelope:

1.png

Also, on the FL Hint bar, from left to top and from bottom to top I see 0%->100% values, not -100%->0%->100%.

Second - I tried this example:

02.png

For what I understand, it should works so:

1 - IEF create the Envelope Follower (Envelope Detector) signal from the Input Signal (or from output of Bank1 if I enable the option to the right section of the plugin; but I don't care right now). For semplify all, I throw as input a sine wave; teorically, the EF should be a sine wave;
2 - The EF generate by IEF is processed: if I increase the volume of the original sine wave, the IEF generated will increase. If the peaks of this one are under 25% (25% in the scale between -36.9db and 0 I guess, for both positive/negative side) will be muted. Between 25% and 50% should increase linear; between 50% and 75% must be "stable" (no modulation on peak). Than, a brutal decline if the peak are over 75%.

In fact this not happens. I never have a "constant" peak modulation, and the % not correspond to the peak volume:

ief.flp

Can you help me to understand this mechanism? Thank you!

Try linking it to CUT instead of VOL, then the ...

Like nucleon said it is easier to wrap your hea...

Well, got what the manual means about mid-line ...

Djfonplaz. The IEF (Input Envelope Follower) is...

[novelty] wrote:Djfonplaz. The IEF (Input Envel...

un.ku wrote:Like nucleon said it is easier to w...

EF = Envelope Follower, So yes as in your last ...

Its Clipping wrote:Using an envelope follower o...

Remember the CUT articulator is bipolar. The m...

nucleon wrote:Remember the CUT articulator is b...

Try increasing the input signal volume, it just...

Maybe I'm tired (it's friday, ok) but why this ...

CUT is the cutoff frequency for that filter typ...

nucleon wrote:Set it to 100% to filter nothing,...

I bump this topic for a related question: the I...

I'm not sure what you're asking. Are you trying...

Perfect Human wrote:I'm not sure what you're as...

Oh the input amplitude. Just guessing but it's ...

Perfect Human is trying to say that the IEF isn...

Perfect Human wrote:Oh the input amplitude. Jus...

Nowhk wrote:Perfect Human wrote:Oh the input am...

Lukeme9X wrote:Nowhk wrote:Perfect Human wrote:...

Positive and negative in the IEF mapping only d...

nucleon wrote:Positive and negative in the IEF ...

The negative values are flipped and combined to...

nucleon wrote:The negative values are flipped a...

Perfect Human wrote:Remember audio samples occu...

Nowhk wrote:How is called this "1 to -1" range ...

xoma wrote:I don't understand, 32bit fp is stil...

I mean: if in an analogic context, the max valu...

Perfect Human wrote:Oh the input amplitude. Jus...

Not sure but I think 0% on the mapping is -INF ...

nucleon wrote:Not sure but I think 0% on the ma...

Its silence. The points in the waveform are exa...

nucleon wrote:Its silence. The points in the wa...

Nowhk wrote:nucleon wrote:Its silence. The poin...

xoma wrote:No, it's not. Absolute Silence is al...

There is a special bit configuration, specified...

xoma wrote:There is a special bit configuration...

Nowhk wrote:xoma wrote:There is a special bit c...

Nowhk wrote:Samples between -36db and -INF are ...

xoma wrote:Just stop thinking in dB, Edison sho...

Its edited like any other sample. Stretch the ...

nucleon wrote:Its edited like any other sample....