QS7777 Ver la hoja de datos (PDF) - Nippon Precision Circuits
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QS7777 Datasheet PDF : 11 Pages
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QS7777PF/CF
Controls (SPREAD, AREA)
The SPREAD input and AREA flag are used to con-
trol the FLOUT and FROUT signals in QSurround
mode. In QSurround mode, the total sound heard is
an enhanced version (virtual sound source) of the
actual sound sources (speaker). When SPREAD is
HIGH, the virtual sound source is widened, strength-
ening the surround enhancement effect. The AREA
flag is used to widen the surround sound effect
sweet-spot. This can be used for a larger listening
audience. Note that AREA is set by serial input data
only, and is therefore not available in parallel inter-
face mode. The SPREAD and AREA control func-
tions are shown in the following figure.
Enhanced FLIN
Sound Source
with SPREAD = L
Front Left
Speaker
Front Right
Speaker
Enhanced FRIN
Sound Source
with SPREAD = L
Enhanced FLIN
Sound Source
with SPREAD = H
Wider Listening Area
(AREA = H)
Narrower Listening Area
(AREA = L)
Enhanced FRIN
Sound Source
with SPREAD = H
Virtualized RLIN
Sound Source
with SPREAD = L
Virtualized RRIN
Sound Source
with SPREAD = L
Virtualized RLIN
Sound Source
with SPREAD = H
Virtualized RRIN
Sound Source
with SPREAD = H
NIPPON PRECISION CIRCUITS—8
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