Hakon Strande wrote: > Bottom line: Don't muck with the users/system default device assignment > because your actions would affect all other app experiences on the system, > not only yours. Thank you for your response. I understand what you mean. If there is no ways to change the default audio device from app, I intended to look for the way to do that from own driver. But it is not appropriate, too. I think I should learn more about Vista/7 audio design and Win7 features. Thanks & best regards, Mana. ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/