Gold

This is a curve with a slow decay at beginning and a fast decay at the end. The area of the curve is 46.07% of the full square area (-6.73 dB).

If based on area ratio (current to Linear (50%), it’s RT60 time should be 0.92 of Linear RT60.

This curve was calculated inserting the number FI in a base 10 logarithmic equation.

Logarithm – Wikipedia

FI is the Golden Ratio 1.61803399…. (X^2 = X+1)

3 UMD

3 UMD means that Each frequency of the chord was faded out at a different speed, using the octave sequence Up-Mid-Down.

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

Inside each Tone folder, 2 folders Major and Minor, having 16 Impulse files each, in a total of 1152 Impulse files, with the following structure:

Wave Naming

3UMDWN Gold A Min 3 means 3 UMD White Noise as generator, Gold as fall curve, A Minor as Tone and 3 seconds of Impulse length.

3UMDWN Gold A Min MS 3 the same as previous but with M/S building processing.

3UMDWN Gold A Min 6 means 3 UMD White Noise as generator, Gold as fall curve, A Minor as Tone and 6 seconds of Impulse length.

3UMDWN Gold A Min D2Oct 3 D2Oct means 2 octaves down.

3UMDWN Gold A Min D2Oct MS 3 the sane with M/S processing.

3UMDWN Gold A Min DOct 3 DOct means one octave down.

3UMDWN Gold A Min Oct 3 Oct means one octave up.

The files on the other folders follow the same syntax meanings