User Guide

Glossary 93
SREV1—Owner’s Manual
Glossary
2-channel mode—In this mode the SREV1 functions as a stereo processor.
4-channel mode—In this mode the SREV1 functions as a 4-channel surround pro-
cessor.
2-channel x2 mode—In this mode the SREV1 functions as two independent stereo
processors (A and B).
ADAT interconnect format—The digital audio interconnect format typically
found on ADAT-compatible digital audio equipment. Eight channels of digital audio
are carried per fiber-optic connection using Toslink connectors.
AES/EBU interconnect format—The digital audio interconnect format, estab-
lished by the AES (Audio Engineering Society) and EBU (European Broadcasting
Union), for transferring digital audio data between professional digital audio equipment.
Two channels of digital audio (left/odd and right/even) are carried per balanced line.
CD-ROM (Compact Disc Read Only Memory)— The compact disc format for
data storage. Defined in the Yellow Book.
Control Change—A type of MIDI message offering real-time parameter control.
Typical Control Changes include Modulation, Volume, Pan, and Portamento.
Convolution—The digital audio process of imposing the characteristics of one signal
onto another signal. The SREV1 convolves an acoustic “fingerprint” of a previously
measured environment onto an audio signal, faithfully recreating the original reverber-
ation, with accurate reflection detail identical to that produced had the sound been
heard in that environment.
Convolution time—Convolution time is not the same as reverb time. Reverb time is
the time it takes the reverberation to decay by –60 dB, and more convolution is required
to provide reverberation down to –90 dB or –120 dB, so the convolution time must be
between 1.5 and 2 times more than the reverb time.
DIO—Abbreviation for “digital input and output.”
Drives—Programs, projects, and impulse-response data can be stored on the follow-
ing drives: Internal Card, PC Card, or CD-ROM. (The Internal Card is compact flash
memory.)
FAT16—The FAT (File Allocation Table) system, developed by Microsoft and sup-
ported by MS-DOS and most Windows operating systems, is essentially a database that
records where files are stored on hard disks and other storage media. FAT12 is the orig-
inal 12-bit version. FAT16 is the 16-bit version, since superseded by the 32-bit version,
FAT32, which supports larger storage devices.
FS—Abbreviation for “sampling frequency.”
Impulse response—The sound pressure measured at a sensor position set against
the time of an acoustic pulse “fired” from the source position. In other words, an envi-
ronment’s acoustical response.
Initial delay—The delay before the reverb reflections start.
ISO9660 Level 2—A standard format for storing files and directories on a CD-ROM.
Conforming discs can be read by Macintosh, Windows, UNIX, and other systems.
Library—The place used to load, save, title, protect, and delete programs from the
Internal Card, PC Card, and CD-ROM.
MIDI (Musical Instrument Digital Interface)—The standard digital interface
for controlling electronic musical systems and audio equipment.