Multi audio cards issue

[Wang,MinJie]

Hi all
I've got a B2000 workstation with two plugin audio cards and one build-in audio card installed

I've run "ioscan -fuCaudio" and the following content is the output:
Class I H/W Path Driver S/W State H/W Type Description
===================================================================
audio 0 10/0/13/0 audio CLAIMED INTERFACE Built-in Audio
audio 1 10/1/3/0 audio CLAIMED INTERFACE Plug-in PCI Audio
audio 2 10/1/4/0 audio CLAIMED INTERFACE Plug-in PCI Audio

Then I used "send_sound audiofile_name" to output some sound,but it seemed like the sound only came out from the build-in audio card.
How can I specific any one of the cards to output sound?
Can you give me any advice?
Thx in advance

[Wang,MinJie]

I've installed HP-UX11.23 on it by the way
I guess maybe there are some utility to manage multiple audio cards.
Can you help me?