16.3.2 Configurable EQ
The configurable equaliser on the CSR8640 BGA:
■
Each EQ filter contains up to 5 fully tuneable stages of cascaded 2
nd
order IIR filters per bank
■
Enables compensation for imperfections in loudspeaker performance and frequency adjustments to the
received audio to enhance music brightness
■
Contains tiering for multiple customer presets, e.g. rock, pop, classical, jazz, dance etc.
■
Contains an easy to use GUI, with drag points, see Figure 16.4
Figure 16.4: Configurable EQ GUI with Drag Points
■
Is configurable with up to 6 switchable bank presets. This enables the headset user to select between the
EQ bank presets through button presses.
16.3.3 Stereo Widening (S3D)
The stereo widening feature on CSR8640 BGA:
■
Simulates loudspeaker listening to provide 3D listening experience
■
Is highly optimised at <1MIPS of the Kalimba DSP
■
Reduces listener fatigue for headphone listening
Advance Information
This material is subject to CSR's non-disclosure agreement
© Cambridge Silicon Radio Limited 2011
Page 100 of 110
CS-209182-DSP1
CSR8640 BGA
Data Sheet
