Kenwood UD-900M - Manual (Page 31)

IASFC (Acoustic surround Field Control) |
Adjust the sound expansion to the presence effect.(F. 4ch, S.4ch only).
DSP (Digital Signal Processor)
The DSP system converts the reverberation components which enhance the presence effects into digital signals, and provides various
presence effects without spoiling the quality of music sources.
Kinds of presence sound and their effects
ARENA Reproduces the effects of a hall, with long reverberation and much reflection of high-frequency sound.
JAZZ CLUB Reproduces the feeling of a live jazz house with sounding cymbals.
STADIUM
Reproduces the reflected sound characteristic to stadiums as PA speaker sounds to create an excitement-charged
atmosphere.
DISCOTHEQUE
Reproduces the feeling of a disco with exciting middle-and high-frequency sounds through the use of moderate
reverberation and a graphic equalizer.
CHURCH Reproduces the rich echoing of solemn church.
MOVE Suppresses reflected from the center and reproduces mild echoing from the others.
GAME Enhances the effects sound of video games to reproduce powerful sound with an atmosphere of presence.
Sound expansiveness I f . 4CH, S. 4CH I
As shown in the example of illustration, the sound of piano
played on the stage attains the ears of listener as a synthesis of
the direct sound from piano, the indirect sounds which are re­
flected once or twice by the reflectors, ceiling and side and back
walls, and the reverberation sounds which repeat infinite re­
flections until they fade out completely.
The indirect sounds always pass through longer routes com­
pared to the direct sound. The delay between the direct and
indirect sounds is called the DELAY TIME, and the level of the
indirect or reverberated sounds is called the PRESENCE LEVEL.
The indirect sounds accompanied with delay play a very impor­
tant role in providing better sound effects and the feeling of
presence of concert halls, etc. The acoustic field also varies
depending on the speaker arrangement.
ASFC simultaneously changes both the delay time and reverb
sound level. Select the ASFC value which sounds best to you.
Example of a concert hall
are delayed sounds.
UD-900/UD-900M (En) 31