USB Sound card and USB headset
opkg update
opkg install kmod-sound-core kmod-usb-audio madplay
opkg remove kmod-sound-core kmod-usb-audio madplay


downloaded some sample from internet
madplay  281.mp3 
Works on both usb sound card and usb headset. Once got proble as Webcam has 
mic that got device name so that need to put in madplay device nr too.

Streaming mp3 audio also works
wget -O - http://w01-cn01.akadostream.ru:8000/europaplus128.mp3 | madplay -
wget -O iii http://w01-cn01.akadostream.ru:8000/europaplus128.mp3 | madplay iii