The sample length of each reverberation impulse (RI) varies - the shortest Classical Hall at 44.1khz/16bit is 485kb; the 192khz/24 bit impulse is 6 mb. Most of the 176khz/24 bit reverb impulses are typically between 8-12 mb. The 44.1khz/16 bit RI's fall in the 600K to 2 mb range.

Considerable amounts of time, design, testing, energy, skill and capital were elemental in the development of this product. Here is a brief outline of theprocess - but please keep in mind that most of these stages include proprietary technologies that I have continuously evolved since the mid90's. First, the reverb impulses are not "starter's pistol" samples recorded in a hall. This and several other methods have been used to generate an acoustic recording of the RI of the space in question.

In the next step after the recording process, each RI is analyzed with custom software designed to reveal the "key ambient components" of the hall. Often, several RI's of the same acoustic space need to be analyzed before the "correct acoustic signature" is revealed. Intense processing time can berequired in this phase for just one "true" acoustic RI signature. The final stage reconstructs the RI in 64 bit floating point architecture with conversion into the SDII and Wav 16/24 formats. (Please note that the same RI at different sampling rates has to be recompiled from scratch and itswaveform optimized for the best sound at the given sampling rate.) If you listen to the same RI at 44khz, 48khz, 88.2khz, 96khz, 176khz and 192khz, all will sound similar but each will have its own unique and subtle sonic idiosyncrasies.

Processing/rendering was all performed on a 867MHz dual processor Power Mac G4 using OS X and System 9.22. This machine is about 4 times faster analyzing and reconstructing RI than my PowerMac 9600 with a G3 300MHz accelerator card. The signal processing for this and all my other sampling CD's since 1993 has been custom proprietary scripts developed using DSP Designer which works inside Apple's MPW environment . One round of calculations (110 RI's) took a number of "round-the-clock" weeks, at which point all data was recalculated again 3 additional times to derive the best possible, most accurate sounding RI.

The production of these Reverberation Impulses are the culmination of years of research, and as anyone who is involved in the field of research knows, return rarely equals the time invested.