dm8168 dvr3.50 32bit 音频

http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/t/191507.aspx?pi199607=1

Ramappa,

The HDMI hardware only supports 16 and 24bit word size. You will not be able to support the same directly .

Alternatively you can use the ASLA "plughw:" options to convert any stream in software based on the support available on the hardware and achieve this.

Ex:

aplay -plughw:0,1    -r3200 -fS31_LE <sample file>

where plughw:0,1 is ur HDMI device  (normal usage is -Dhw:0,1)

播放的时候似乎可以通过一些alsa的设置，播放32bit；

采集的时候呢？有类似的参数设置吗，可以采集32bit输入，但是实际保存的有效数据是16bit。