6
Illusonic
IAP
Chapter 1
Introduction
Volume Control
In order to be able to connect directly to power amplifiers or active loud-
speakers, IAP features volume control, implemented digitally. Volume control,
using 32-bit floating point arithmetic and dithering, is applied just before the
DACs.
Calibration
IAP Calibration software and IAP are a system for acoustic measurement,
analysis, and optimization. Each IAP channel features gain, delay, polarity,
and fully parametric equalizers, which can be used for linearization, time-
alignment, room EQ, and crossovers.
Tone Control
While room equalization has the goal to mitigate dominant characteristics of
the room, Tone Control is used to subjectively adjust the level of low and high
frequencies.
Not only bass and treble gain can be adjusted, but also their frequencies.
With this flexibility, Tone Control can also be used to optimize sound for a
zone far off sweet spot (e.g. dinner table, other room, etc.). IAP Calibration
software includes means of optimizing Tone Control.
Clarity
A good musician can adapt, the way how he plays, to the room. For example,
in a room with bass resonances, a bass player can play “shorter” to reduce
resonances. This also works at higher frequencies, a violin can adapt its play-
ing to reduce negative effects of a bad room.
Similarly, Clarity adapts the music, such that it excites a room’s resonances
less, making the sound more transparent and bass more dry.
