Battery Life; Iva Individual Virtual Acoustics - AKG IVM 1 User Instructions

only way you can hear your personal monitor mix
perfectly. If you use only one in-ear phone, the effect
of IVA processing will be lost.
6. Slide the cable sheath (9b) up to the point that the cable will
rest securely against your neck (see fig. 9d, 9 to 11).
7. Set the BALANCE L/R control to its center position. If neces-
sary, you can change the balance between the left and right
channels at any time during the soundcheck.
7.2. SST1 Transmitter
1. Connect the supplied AC adapter (fig. 4) to the transmitter and
plug the power cord into a convenient AC outlet. The AC
adapter will operate on any line voltage between 100 VAC
and 240 VAC with no switching or modifications.
The display will indicate the installed software version. After a
few seconds, the display will change to the last active menu
(refer to section 7.5).
2. To feed a mono signal to the SST1, connect your source to the
LEFT/MONO INPUT XLR socket (2b). Switch the transmitter to
mono mode in the "Stereo/Mono" menu (refer to section
7.5.2).
To feed a stereo signal to the SST1, connect the left channel of
your source to the LEFT/MONO INPUT XLR socket (2b) and the
right channel to the INPUT RIGHT XLR socket (2c). Switch the
transmitter to stereo mode in the "Stereo/Mono" menu (refer to
section 7.5.2).
3. Use the IN LEVEL control (1c) to set the input level.
The IN LEVEL LEDs (1c) illuminate green at levels between
-50 dBV and -8 dBV, and red when the integrated soft knee
limiter engages.
4. Use the VOLUME control (1b) to set the output level at the
PHONES jack (1a).
5. Connect either the supplied BNC antenna (fig. 3) or an option-
al remote antenna (fig. 12) to the ANTENNA socket.

7.3. Battery Life

Be sure to use new, fresh AA size 1.5-V batteries only We recom-
mend IEC LR61 alkaline batteries from Duracell, Panasonic, or
Varta.
Guaranteed battery life, depending on the sell-by date, is
6 to 10 hours for dry batteries, 3 hours for good quality, fully
charged NiCd or 6 hours for NiMH rechargeable batteries.
7.4. IVA - Individual Virtual Acoustics
One drawback of listening over headphones is the psycho-
acoustic phenomenon that you will hear the sound inside your
head. The IVA (Individual Virtual Acoustics) binaural audio process-
ing technique simulates a concert stage environment. It simulates
a combination of conventional monitors and sidefills as they would
typically be placed on a stage.
The IVM1 provides eight ear matching functions, "Ear1" through
"Ear8" from which you can select the one that sounds best to you.
When selecting the ear matching function, listen for good stereo
balance and a smooth, natural sound. The other menus described
in section 7.5 allow you to adjust the IVM1 to your individual pref-
erences as to room size, sound, reverberation, panorama, etc.
7.4.1. How IVA Works
18
Fig. A: Natural hearing: Sound waves arriving at one ear
differ from those at the other. Amplitude and phase differences
create a sense of spatial hearing.
Fig. B: Listening through headphones: Amplitude and
phase differences are eliminated. Sound sources are localized
inside the head rather than in the room.
Fig. C; Listening through headphones using IVM1
and IVA: The ear matching function changes the audio signals
at the ears to resemble fig. A. This restores natural binaural, spa-
tial hearing.