D2-926XX_14 Datasheet, PDF (31/38 Pages) Intersil Corporation – Intelligent Digital Amplifier and Sound Processor

D2-926xx
DELAY
Delay Blocks introduce an adjustable delay of a channel's audio
data. Buffer size is fully user-configurable, supporting adjustment
over a range as small as milliseconds, to over 1 second.
COMPRESSOR
Compressors provide threshold-dependent level adjustments,
implementing dynamic attenuation at configurable rates as the
control signal level increases. Headroom level is configurable,
supporting adjustable threshold ranges. Ratio, threshold, and
attack/release times are also fully adjustable. Compressors
incorporate a side chain input for algorithm control, supporting
compressing or limiting operation from inputs independent of
the processed channel audio signal flow.
COMPRESSOR/EXPANDER
The Expander Compressor implements dynamic low level signal
expansion, or an upward compression to audio levels. The
Expander Compressor implements dynamic low level signal
expansion for an upward compression to audio levels. Adjustable
settings include gate threshold and ratio, expansion threshold,
ratio, and expansion gain limit, and attack and release times.
ENVELOPE VOLTAGE CONTROLLED AMPLIFIER
The Envelope VCA processes its control input to establish an
amplitude envelope signal representing the audio path input
level. The Envelope VCA uses its side chain input to establish an
amplitude envelope of the audio level. Controls are similar to
that of the Compressor Block.
REVERB
The Reverb Block is a 2-channel stereo reverb processor. It
provides adjustable reverb time and damping settings, and its
built-in mixer includes adjustments for both dry and wet audio
levels.
CHIME GENERATOR
The Chime Generator contains 3 oscillators, each with adjustable
frequency and gain. When triggered, the oscillators initially
produce full programmed output levels that then decrease at
their programmable decay time rate.
RMS LEVEL METER
RMS Meters provide real-time indication of the signal levels
through the audio processing path. Visible in the Audio Canvas III
signal flow, they provide continuous level indication. Measured
data in the meter's registers may also be read by system
controllers for monitoring levels in a final production system.
FADE-PAN
The Fade-Pan control provides level adjustment of 4 input
channels to 4 output channels. Implementation includes a
Rear/Front fade adjustment, and a Left/Right balance
adjustment. Controls are continuously adjustable, providing unity
gain at mid-point settings, and attenuating output levels of its
channels as the respective control is adjusted away from that
channel's direction.
MONO MIXER
A Mono Mixer is a threshold-gating mixer that routes the sum of
either or both of its 2 inputs into its output, based on a control
level input. This threshold-controlled mixing supports processing
of input audio that may be mono on both Left and Right, or
containing content on only one of Left or Right. This summed
audio then passes equally to stereo processing and output
system channels.
DITHER GENERATOR
The Dither Block generates a random noise (dither) pattern at a
shaped-spectrum low level. This noise is available to sum into the
audio path using a mixer, pushing up low-order bits of low-level
audio. This process enables improved uniform audio quality
when digital bit depth truncation is required because of
interfacing equipment. Audio signal flow data is normally
processed and output in digital format as 24 bits from the
channels assigned to the SAI digital outputs.
HARMONICS GENERATOR
The Harmonics Generator provides a harmonic spectrum content
from audio presented to its input. Harmonic order and amplitude
is programmable, supporting customized audio processing
features.
SoundSuite™ Processing
The D2Audio SoundSuite™ audio processing provides a full set of
enhancements to audio that greatly add to the quality and
listening experience of sound in wide scopes of consumer
devices. The SoundSuite algorithms use psycho-acoustic
processing that create a rich-sounding environment from small
speakers, and synthesizes the sound and quality equivalent to
more complex systems. It is especially suited to consumer
products that include televisions, docking stations, and mini hi-fi
stereo products. SoundSuite Processing includes:
• D2Audio™ WideSound™
• D2Audio™ WideSound™ x4
• D2Audio™ DeepBass™
• D2Audio™ Mono2Stereo™
D2Audio™ SoundSuite™ algorithms are completely supported
with all part numbers of the DAE-3 and DAE-3HT families.
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FN6787.2
July 12, 2012