[libvirt-users] Config Errro when Creating a virtual device attachment to backend

[huachao yao]

Hi, buddy,
I want to create a virtual device attachment to backend.
The domain is running, and my code  phase is as below:

xmlConfiguration    = "<devices><sound model='es1370'/></devices>";
virDomainAttachDevice(dom,xmlConfiguration);

But the exception "libvir: Domain Config error : XML error: unknown device
type " happen when running.
Is it something wrong in the XML configuration? What should i do to deal
with such Config error ?

ps: the hypervisor is KVM.
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