[orca-list] ideal multi channel mixing feature support USB sound cart compatible with Linux kernel

["Mgr. Janusz Chmiel" <ernesta tiscali cz>]

Dear users and developers,
Does somebody of us know about USB audio device which support multi 
channel mixing feature so speech responsiveness would be ideal because 
of this feature? And if this feature can not be made by using USB 
protocol, which notebook model is containing build in internal chips to 
support multi channel mixing feature? Somebody have written  many months 
or years ago here, that if sound cart support multi channel mixing, it 
solves hidden issues related to Pulse audio and speech synthesizer.
Thank You very much for Yours help.