The "Audio" range is currently determined by a mixture of the sampling rate and sample length, but might more sensibly be determined (eventually) by the range detectable by the human ear.
The "Delay/travel time" will give an offset of Tz seconds between the sound being generated and heard.
The "Volume distance" is the equivalent to the "luminosity" distance in the universe, so the one that gives a 1/r2 effect - this is not necessarily the same as the delay time in a curved/expanding Soniverse.
Our Soniverse has a short "Age". This could eventually perhaps be related to the "Performance time"?
Some combinations of parameters are unphysical (unsonical?) and give "NaN"s.