N900 Hardware Audio Codec
The Audio codec encodes and decodes audio.
Contents |
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.