InvKoch

This is a curve with a very fast decay at beginning and a very slow decay at the end. The area of the curve is 26.89% of the full square area (-11.41 dB FSA).

If based on area ratio (current to Linear (50%), it’s RT60 time should be 0.52 of Linear RT60.

This curve was calculated inserting the number 0.792481 (inverse of Koch 1.261860
[ log4/log3 ]) in a base 10 logarithmic equation.

3 UMD

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

It is basically intended for percussive material, spoken word with a long soft decay, or any electronic music purpose.

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 folder structure:

Examples:

• 3UMDWN InvKoch A Min 3 means 3 UMD White Noise as generator, InvKoch as fall curve, A Minor as Tone and 3 seconds of Impulse length.
• 3UMDWN InvKoch A Min MS 3 the same as previous but with M/S building process.
• 3UMDWN InvKoch A Min 6 means 3 UMD White Noise as generator, InvKoch as fall curve, A Minor as Tone and 6 seconds of Impulse length.
• 3UMDWN InvKoch A Min D2Oct 3 D2Oct means 2 octaves down.
• 3UMDWN InvKoch A Min D2Oct MS 3 the sane with M/S processing.
• 3UMDWN InvKoch A Min DOct 3 DOct means one octave down.
• 3UMDWN InvKoch A Min Oct 3 Oct means one octave up.

The files on the other folders follow the same syntax meanings