Mono -> Stereo Impulse Responses, 195 225

For the first practical try, we choose a transition from chaos to order (param 195->225), that we've been studying here (paragraph named "Audio samples : X(t), a transition to order, 195.00 to 224.75).

Very likely, we'll have a reverb that goes from plain diffuse field to plain echoes.

Method :

1.
We try first with a series of 120 values, a regular scale from 195 to 225.
The RMS spectrum of the system for each value is calculated, then exported to an audio file.
Those 120 mono, 32768 sample long impulse responses are then tested in Altiverb.

2.
From those 120 impulse responses, we retain only 25 - a lot of the 120 IRs were very much alike.
Those impulse responses are then created once more, this time with 131072 samples ~ 3sec at 44k1.
That makes 25 mono files.

3.
Then a new series , this time with different initial parameters, in order to get 25 different files exhibiting the same behaviour.
With those new 25 mono files we have 25 stereo IRs.

4.
Then : those 25 files stereo IRs are compressed - in Maple, using a non real time algorithm - not in an audio processor.
=> that makes two sets of 25 stereo IRs, one "light" and one "dense" (the compressed one).

5.
Last step : all those IRs are tested, and corrected if it is needed.
The main correction consists in a L/R perceptive balance.

Here are the movies in which those IRs can be heard, along to the attractors corresponding to X(t).
Click on the pictures to open them...

IRs - normal	IRs - compressed

( attractors corresponding to X(t), audio is the impulse response stereo couple - that for the 25 values
Quicktime movie, AAC audio 128kbs stereo, env 2MB each. )