Astroid

This is a curve with a fast decay at beginning and a slow decay at the end. The area of the curve is 29.85% of the full square area (-10.38 dB).

If based on area ratio (current to Linear (50%), it’s RT60 time should be 0.61 of Linear RT60.

This curve was calculated from the Astroid Curve Equation ( https://en.wikipedia.org/wiki/Astroid )

WPN

This collection was made by direct Fall from a mix of White and Pink Noise of default style Octave Curves.

It’s a general-purpose fast 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 12 tone folders (A to Bb).

Inside each tone folder we have 12 direct impulse files covering 3 octaves more 5 folders of different building type impulses, as follows:

N is another type of direct unprocessed building

WPN I is a slower fall of frequency bands

WPN II is a faster fall of frequency bands

WPN III is a progressively faster fall of frequency bands

WPN IV is a progressively slower fall of frequency bands

A total of 2592 impulse files. with the following folder structure:

Wave Naming

WPN AST A 3 means White + Pink Noise as generator, Astroid as fall curve, A as Tone and 3 seconds of Impulse length.

WPN AST A MS 3 the same as previous but with an M/S building processing

WPN AST A 6 means White + Pink Noise as generator, Astroid as fall curve, A as Tone and 6 seconds of Impulse length.

WPN AST A Oct 6 Oct means one octave up

WPN AST A DOct 6 DOct means one octave down

The files on the other folders follow the same syntax meanings