HS066

This is a curve with a medium slow decay at beginning and a  very slow decay at the end. The area of the curve is 40.75% of the full square area (-7.8 dB).

If based on area ratio (current to Linear (50%), it’s RT60 time should be 0.81 of Linear RT60.

This curve was calculated from the Hyperbolic Secant Curve Equation, applying a value of 0.666666 as constant

https://mathworld.wolfram.com/HyperbolicSecant.html

https://archive.lib.msu.edu/crcmath/math/math/h/h424.htm

2 SMO D5

Diminished fifth is a musical interval that divides an octave into two equal parts

9 Octaves of Root tones and their diminished fifth were faded out by default fall curves. The generators are three different types of Smoothed Whit Noise with delay.

It’s a general-purpose soft slow decay impulse, for vocals and instruments, or any electronic musical source.

The collection is divided into  44.1 kHz 24 bit, 48 kHz 24 bit and 96 kHz 24 bit folders.

Inside each folder 6 tone folders (A + Eb to C# + G).

Inside each Tone folder, 3 folders of different source types, having 8 Impulse files each, in a total of 432 Impulse files, with the following folder structure:

Waves Naming

SMOO I WND HS066 A+Eb D2Oct 3 means SMOO I White Noise as generator, two octaves down Hyperbolic Secant 0.666666 as fall curve, A + Eb as Tone and 3 seconds of Impulse length.

SMOO I WND HS066 A+Eb D2Oct MS 3  the same as previous but with an M/S processing.

SMOO I WND HS066 A+Eb D2Oct 6  means SMOO I White Noise as generator, two octaves down Hyperbolic Secant 0.666666 as fall curve, A + Eb as Tone and 6 seconds of Impulse length.

SMOO I WND HS066 A+Eb DOct 6  DOct means 1 octave down.

This is a curve with a medium slow decay at beginning and a  very slow decay at the end.

The files on the other folders follow the same syntax meanings