N900 Hardware Audio Codec: Difference between revisions
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The audio codec is a low-power 4 channel codec [http://focus.ti.com/docs/prod/folders/print/tlv320aic34.html From TI]. | The audio codec is a low-power 4 channel codec [http://focus.ti.com/docs/prod/folders/print/tlv320aic34.html From TI]. | ||
It is connected to the CPU using [[N900 Hardware Bus I2C|I2C]] and the MCBSP serial digital audio interface. | |||
==Software== | ==Software== | ||
Revision as of 18:11, 12 August 2010
The Audio codec encodes and decodes audio.
Hardware
The audio codec is a low-power 4 channel codec From TI.
It is connected to the CPU using I2C and the MCBSP serial digital audio interface.
Software
User
The audio codec is driven by pulseaudio, through ALSA. The ALSA interface is usually not exposed in maemo 5 - adding:
pcm.real {
type hw
card 0
}
ctl.real {
type hw
card 0
}
to /etc/asound.conf enables a hardware device. Stopping pulseaudio may be required to use this.
Kernel
The codec is driven by a driver built into the kernel.
