Editing N900 Hardware Audio Codec

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It is connected to the CPU using [[N900 Hardware Bus I2C|I2C]] and the MCBSP serial digital audio interface.
It is connected to the CPU using [[N900 Hardware Bus I2C|I2C]] and the MCBSP serial digital audio interface.
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===Unutilised Functions===
 
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The audio codec supports a flexible digital filter on both the input and output.
 
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This can be used to perform equalization with no CPU load.
 
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This function is not used, and pulseaudio is used for this task when speakers are enabled.
 
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It can also route the audio directly from the FM receiver to the speakers or the headphones, optionally through this hardware EQ module, also reducing power in this usecase, by entirely eliminating CPU usage.
 
==Software==
==Software==

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